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Does anyone out there have the IMAN i3 from China working with AT&T? We were able to get the phone working with voice/text with no issues, but the data will not flow. Not really sure what the problem is. We've tried manually programming the APN to get it to work and it doesn't seem to help. Any advice would be great. Even if it's an APN you know works. Thanks guys!
According to the specs of the phone, it will not get 3G here in the US. It is odd that Edge isn't working though. I'm assuming you did make sure that data is enabled? (sorry, but it's been known to happen...) The tricky thing is that there are a handful of different APN configurations out there and some work better on certain devices and/or updates than others and maybe even location dependent for some. Check out this thread to see what I mean:
http://forum.xda-developers.com/showthread.php?t=2172110
I would try some of those and see what happens...
es0tericcha0s said:
According to the specs of the phone, it will not get 3G here in the US. It is odd that Edge isn't working though. I'm assuming you did make sure that data is enabled? (sorry, but it's been known to happen...) The tricky thing is that there are a handful of different APN configurations out there and some work better on certain devices and/or updates than others and maybe even location dependent for some. Check out this thread to see what I mean:
http://forum.xda-developers.com/showthread.php?t=2172110
I would try some of those and see what happens...
Click to expand...
Click to collapse
Yeah, data was enabled. I even swapped out with a T-Mobile SIM, which at least get Edge service, and it worked. I tried a few different APN configurations and it finally at least got Edge. That sucks we can't get 3G though. I take it that this is going to be the case for most phones coming out of China?
ljzrelak said:
Yeah, data was enabled. I even swapped out with a T-Mobile SIM, which at least get Edge service, and it worked. I tried a few different APN configurations and it finally at least got Edge. That sucks we can't get 3G though. I take it that this is going to be the case for most phones coming out of China?
Click to expand...
Click to collapse
Yes. As they use different bands for data then in the states.
zelendel said:
Yes. As they use different bands for data then in the states.
Click to expand...
Click to collapse
True, but there are plenty of Chinese companies that have expanded their offerings to include phones that can get HSPA here.
OP: When you are searching for phones, the main thing you need to check for for data compatibility is that the phone uses the 1900 Mhz freq for WCDMA or HSPA. Pretty much every phone will say that it uses 1900, but you have to check to see if it is only listed for 1900 under GSM (which will be the 2g or Edge data) or if it's listed there and for 3g/WCDMA/HSPA/UMTS (these are often used interchangeably on many sites).
Take for instance, the lineup of phones from the company BLU (they rebadge some Chinese phones to sell in North and South America and add a few of their own touches). They have 2 series for each line of phones - one ending in "i" and one in "a". Same phone, just have different data bands enabled. "i" is for International and "a" is sold in the States and gets our type of 3g.
ljzrelak said:
Does anyone out there have the IMAN i3 from China working with AT&T? We were able to get the phone working with voice/text with no issues, but the data will not flow. Not really sure what the problem is. We've tried manually programming the APN to get it to work and it doesn't seem to help. Any advice would be great. Even if it's an APN you know works. Thanks guys!
Click to expand...
Click to collapse
Hi friend! do u have stock firmware? I need very much!
Unlocked AT&T-branded PadFoneX. I'm getting low reception on Band 4 and no HSPDA+ reception whatsoever.
I upgraded the unit to the PadFoneS firmware and did the four Asus upgrades to bring it up to date with no better result. Applied the 99.99.99 down-grade back to KitKat and still no love. I use the APN settings for Fast T-Mobile USA and have tried others as well. My Huawei MediaPad Pro T1 8.0 gets strong T-Mobile reception and then switches over to HSPDA+ coverage once I enter my office building. The PadFone gets weak 4G LTE and then switches over to EDGE once I enter the building.
I was really hoping to replace my 8-inch Huawei with the PadFone but the radio reception just doesn't compare and I can't stand being forced to use EDGE inside my office building when I know that T-Mobile HSPDA+ coverage is usable within my building using the Huawei Phablet.
Can someone please please please help me in "fine tuning" this thing for T-Mobile. By the way the PadFone is rooted and I've unlocked the bootloader as well. Maybe there is updated modem firmware to flash? I just don't know what else I can do..
If you get HSPDA+ coverage from T-Mobile on your PadFone can you please share your configuration and APN settings??
Thank you!!!!!!
Chris R.
I have a PFX flashed to PFS Kitkat running on T-Mobile. Connects to the LTE network fine using the fast.t-mobile.com APN. Yes, reception seems to be on the weak side, but it gets the job done for me. Suspect that Mediapad gets a better signal due to it being larger = larger antenna.
HSPA works fine for me as well, but as this is an AT&T/International device, you'll only connect to HSPA on Band 2 (1900MHz). It lacks HSPA Band 4 (1700MHz/2100MHz) for T-Mobile's more extensive 3G network. It looks like that Mediapad has HSPA Band 4 (http://pdadb.net/index.php?m=specs&id=7233&c=huawei_mediapad_t1_8.0_pro_4g_td-lte_t1-821l), so that's probably why it's able to get HSPA signal while the PF does not.
Thank you!
xtermmin said:
I have a PFX flashed to PFS Kitkat running on T-Mobile. Connects to the LTE network fine using the fast.t-mobile.com APN. Yes, reception seems to be on the weak side, but it gets the job done for me. Suspect that Mediapad gets a better signal due to it being larger = larger antenna.
HSPA works fine for me as well, but as this is an AT&T/International device, you'll only connect to HSPA on Band 2 (1900MHz). It lacks HSPA Band 4 (1700MHz/2100MHz) for T-Mobile's more extensive 3G network. It looks like that Mediapad has HSPA Band 4 (http://pdadb.net/index.php?m=specs&id=7233&c=huawei_mediapad_t1_8.0_pro_4g_td-lte_t1-821l), so that's probably why it's able to get HSPA signal while the PF does not.
Click to expand...
Click to collapse
Thank you for your detailed answer! Finally, someone that understands this stuff! Hey, could I get the exact model number of your model?? I'm wondering if I could buy one like yours and then have it unlocked..curious...
Thanks!!!
Chris R.
crodgers79 said:
Thank you for your detailed answer! Finally, someone that understands this stuff! Hey, could I get the exact model number of your model?? I'm wondering if I could buy one like yours and then have it unlocked..curious...
Thanks!!!
Chris R.
Click to expand...
Click to collapse
My device is the AT&T Asus Padfone X (ASUS_T00D). On the white label under the back cover it lists the manufacturing date as 2014/05/31 and is H/W Revision 1.6 (PFX was launched in July 2014, so this is probably a launch model). Bought it from Ebay a year ago pre-unlocked. Used it on AT&T's firmware for a few months before flashing the latest Asus Padfone S (ASUS_T00N) Kitkat firmware, "WW_11.10.7.18". I think I had to manually set my APN, but was able to connect fine.
Looking at the signal levels, the PFX pulls in -108dBm at my desk, while my Moto E2 pulls in -100dBm, both on LTE Band 4. Moto devices tend to have better radios, but I didn't expect the smaller, budget Moto E2 to pull in a better signal than the PFX.
OK, now I'm confused....
xtermmin said:
My device is the AT&T Asus Padfone X (ASUS_T00D). On the white label under the back cover it lists the manufacturing date as 2014/05/31 and is H/W Revision 1.6 (PFX was launched in July 2014, so this is probably a launch model). Bought it from Ebay a year ago pre-unlocked. Used it on AT&T's firmware for a few months before flashing the latest Asus Padfone S (ASUS_T00N) Kitkat firmware, "WW_11.10.7.18". I think I had to manually set my APN, but was able to connect fine.
Looking at the signal levels, the PFX pulls in -108dBm at my desk, while my Moto E2 pulls in -100dBm, both on LTE Band 4. Moto devices tend to have better radios, but I didn't expect the smaller, budget Moto E2 to pull in a better signal than the PFX.
Click to expand...
Click to collapse
I pulled the back cover off of mine, it too is a T00D and, get this, manufacturing date was 2014/05/22 (!!!) FCC ID is MSQT00D, and H/W is 1.6 (!!).
I too did the X-to-S conversion and yesterday I applied each successive update until I got to the very latest 12.2.2.43 (16 Dec 2015).
So if we have nearly identical hardware, is there anything that I can do to improve reception? Could you send me the settings you used for APN?
Thanks!
Chris R.
By the way, your Moto is the better device, the lower the db number the better AFAIK..
crodgers79 said:
I pulled the back cover off of mine, it too is a T00D and, get this, manufacturing date was 2014/05/22 (!!!) FCC ID is MSQT00D, and H/W is 1.6 (!!).
I too did the X-to-S conversion and yesterday I applied each successive update until I got to the very latest 12.2.2.43 (16 Dec 2015).
So if we have nearly identical hardware, is there anything that I can do to improve reception? Could you send me the settings you used for APN?
Thanks!
Chris R.
Click to expand...
Click to collapse
Don't know how to improve the reception, but here's my APN settings:
Name: T-Mobile LTE
APN: fast.t-mobile.com
MCC: 310
MNC: 260
APN Type: default
APN protocol: IPv4
APN roaming protocol: IPv4
Bearer: Unspecified
Everything else is set to Not Set/None.
I didn't set up the MMS proxy as I'm using a tablet data-only plan on the PFX. (I think data-only plans come with free SMS/MMS, but I don't use it.)
crodgers79 said:
By the way, your Moto is the better device, the lower the db number the better AFAIK..
Click to expand...
Click to collapse
I know, which is why I was surprised that the cheap budget Moto E2 got a better signal than the PFX
crodgers79 said:
By the way, your Moto is the better device, the lower the db number the better AFAIK..
Click to expand...
Click to collapse
I probably know why you are not receiving a a good signal on your device.
The thing is when you do the conversion, from padfone x to padfone s, the partiton gets overwritten and causes some of the bands to be lost.
That partition is called the efs partition, and probably you have lost some bands that probably would have worked better before you flashed.
The side effects can be seen through the software when additional call settings does not work. (SIM doesnt get recognized)
That is a known problem, and to avoid that you had to back up the efs partiton prior to the conversion so you could restore those kinds of connections after the conversion.
--- You had to use adam outlers repacked twrp version to do all that.
I know many of the guides there have replaced mine but they forgot that one thing that has been talked over, and thanks to tjsooley and the people during that time, they were able to figure it out.
Thanks..but consider this..
Justatechie said:
I probably know why you are not receiving a a good signal on your device.
The thing is when you do the conversion, from padfone x to padfone s, the partiton gets overwritten and causes some of the bands to be lost.
That partition is called the efs partition, and probably you have lost some bands that probably would have worked better before you flashed.
The side effects can be seen through the software when additional call settings does not work. (SIM doesnt get recognized)
That is a known problem, and to avoid that you had to back up the efs partiton prior to the conversion so you could restore those kinds of connections after the conversion.
--- You had to use adam outlers repacked twrp version to do all that.
I know many of the guides there have replaced mine but they forgot that one thing that has been talked over, and thanks to tjsooley and the people during that time, they were able to figure it out.
Click to expand...
Click to collapse
Thanks! I did read through all these threads searching for an answer before I posted my question. the first time I did the X-to-S conversion I thought exactly what you said (destroyed the efs partition containing the modem info). So I went back and loaded the 99.99.99.99 version posted on the Asus site which is supposed to restore it to factory settings and back to KitKat but that had no effect. Since 99.99.99 is for the PadFone S maybe that doesn't make use of the partition under KitKat, I don't know.
What I would dearly love to load is a flashable version of the original AT&T software (thereby restoring the partition and the modem info). I saw one guy had posted TWRP backups of stock but when I tried to restore them to my phone the script bombed and it aborted.
I agree with the other gentleman, I need UMTS Band 4 - (1900/2100) for this thing to work well in my area and it looks like this phone doesn't support it. If I could find someone familiar with QPST to tell me if that band is unlockable that wold be great!
Thanks!!!!
Chris R.
Unfortunately QPST couldn't work with this device, idk know why.
You could find out by searching through using the xda search engine, but the question is, did you back up your modem for this device prior, because it could be restored when the phone is on a stock fw, then you could create an efs backup afterwards.
To answer the question with the tarp backups, those were created from the repacked twrp version so flash that first and back up everything before you restore back to at&t fw. I don't think the quarx version could work with that since the repacked was based on the nexus 5. (Similar parts) (be aware that you need to wait a couple of mins for the black screen to go away, on that version of twrp.)
The thing is that I could use band 2 and 4 on at&t with this fw, (I did not restore my efs partition since the conversion since I lucky live in a good area) but it looks like band 4 doesn't work for t-mobile, hmmm maybe it is incompatible like the other guy said, but we'll see. After wards you gotta see if these bands would restore upon restoring back to the at&t fw.
Justatechie said:
I probably know why you are not receiving a a good signal on your device.
The thing is when you do the conversion, from padfone x to padfone s, the partiton gets overwritten and causes some of the bands to be lost.
That partition is called the efs partition, and probably you have lost some bands that probably would have worked better before you flashed.
The side effects can be seen through the software when additional call settings does not work. (SIM doesnt get recognized)
That is a known problem, and to avoid that you had to back up the efs partiton prior to the conversion so you could restore those kinds of connections after the conversion.
--- You had to use adam outlers repacked twrp version to do all that.
I know many of the guides there have replaced mine but they forgot that one thing that has been talked over, and thanks to tjsooley and the people during that time, they were able to figure it out.
Click to expand...
Click to collapse
The EFS partition contains the modem, yes, but this isn't the issue here. When it comes to bands used in the USA, the Padfone S firmware has all the bands the Padfone X uses except for LTE Band 17, which is only used by AT&T, and would not affect T-Mobile in this case. I was able to use my PFX-converted-to-PFS on T-Mobile without restoring EFS fine.
Thanks!
xtermmin said:
The EFS partition contains the modem, yes, but this isn't the issue here. When it comes to bands used in the USA, the Padfone S firmware has all the bands the Padfone X uses except for LTE Band 17, which is only used by AT&T, and would not affect T-Mobile in this case. I was able to use my PFX-converted-to-PFS on T-Mobile without restoring EFS fine.
Click to expand...
Click to collapse
I think the PadFone's lack of UMTS Band 4 is what's keeping me from getting HSPDA+ inside my office building. Once I head into the building my 4G on Band 4 reverts to Edge (ugh!) and I have a 14Gb tethering plan so that I can run my tablet while inside the building..arrggh!
Thanks for your response!
Chris R.
Hello, I have got a Le Max 2 with 6 GB / 128 GB (used, no warranty). Got it with ROM EUI 5.8.019S.
I have severe mobile network problems. I live in Dusseldorf, Germany, where LTE/4G (vodafone) never was a problem. The Le Max 2 shows 4G, often H or E or no service. Very rarely I get up to 15.000 kbit/s, but more often I get nothing. I tried with new APN, both SIM slots, vodafone and O2-SIM cards, reset to factory and finally i changed to Madsurfer ROM which works fine but does not change the network problem.
I don't know much about mobile network management but it seems like something is going wrong there. When my phone can not work with 4G it does not fallback to 3G or 2G but is completely offline.
Is it possible to flash a different modem?
siijii said:
Hello, I have got a Le Max 2 with 6 GB / 128 GB (used, no warranty). Got it with ROM EUI 5.8.019S.
Is it possible to flash a different modem?
Click to expand...
Click to collapse
There is description here how to check bands. Maybe you have US bands? There is also newest version of ROM 5.9 21s
If I help you please express it.
Do you mean the post about activating LTE / 3G bands? I tried this and it improved a little but only for a while (maybe random coincidence) and now it seems to be even worse. I flashed several roms with twrp but there was no improvement.
I found out that the modem settings are stored in special small partitions like modemst1 / -2 and you can erase them with fastboot. There exist some post about other phones where it helped to erase them and after a reboot they are created new (from other backup partitions) but I hesitate before I have further information - though I think I can not destroy more.
siijii said:
Do you mean the post about activating LTE / 3G bands? I tried this and it improved a little but only for a while (maybe random coincidence) and now it seems to be even worse. I flashed several roms with twrp but there was no improvement.
I found out that the modem settings are stored in special small partitions like modemst1 / -2 and you can erase them with fastboot. There exist some post about other phones where it helped to erase them and after a reboot they are created new (from other backup partitions) but I hesitate before I have further information - though I think I can not destroy more.
Click to expand...
Click to collapse
The modem files are changed by original roms.
Cooked roms do not change modem files.
so, try to install a original rom, like indian o chinese...
Try with the Indian ROM.
I flashed indian and chinese stock (with full wipe each time), did not help. Tried also madsurfer, TeamSpain Revolution and now Rom V6-X820 of Bshuy2003.
I still get network, internet works, after a while I can't download anything and often lose network completely or get E(DGE) though LTE signal should be good even inside building (in Düsseldorf) where I am testing. My Note 4 gets 4G all the time with no problem. I do not only have that problem in buildings though. Net is unreliable even outside. Works and then stops working after a while.
I installed LTE Discovery and found out: The Phone connects to LTE band 20 station, RSRP from -70 to -90 dBm (which is good), I can download at reasonable speeds (not very good though), after a while it connects to LTE band 3 or 7 stations with bad RSRP (above -100 dBm, often -115 dBm) and I can't download anything (My Note 4 can even with about same RSRP). Often it then moves to (E)DGE. If I restrict the Phone to 3G sometimes I get H or H+ (HSPA) but no good connection. Often carrier is lost completely. Sometimes LTE Discovery app states "Potential eCSFB issue detected", maybe there is a problem with the Fallback management.
It would work if the Phone did not change vom LTE band 20 to 3 or 7 stations.
I found this in CatLog, could it be related to the problem?
12-03 08:47:15.618 I/NetworkController.MobileSignalController(slotId:0 subId:1)( 2434): onServiceStateChanged voiceState=0 dataState=1 dataNetType = 0 servicestate:0 1 voice home data home Vodafone.de Vodafone 26202 Vodafone.de Vodafone 26202 GSM Unknown CSS supported -1 -1 RoamInd=-1 DefRoamInd=-1 EmergOnly=false IsDataRoamingFromRegistration=false
Click to expand...
Click to collapse
There were also entries with "LTE or EDGE Unknown CSS supported -1 ...."
I also faced the same problem with brand new Indian X821. Mobile signal very weak or not signal at all. No amount of flashing stock or custom ROM fixed the problem. Flashing new or old NOH-HLOS.bin doesn't help. Other than this, there is no problem at all with the phone.
Any help is appreciated.
any update on this?
Negetive
I didn't face such issue. Probably hardware problem?
Guys, check out this page for all x820 modem, hope it's help!
https://yadi.sk/d/woKdrlRrv8yhr
Flash it with twrp and reboot.
I have a 4GB X820 and use USA AT&T. After recovering my phone from a hard brick using FlashOne, my cell data (voice would still work) would never come back up after switching out of airplane mode, and I'd have to reboot to get it to work again. Also at times, I would be in my house and would watch my signal go from full bars to one or none, every several seconds. I just flashed the 16s v.00024 modem in the USA folder from the link sky104hk posted and all is well so far.
For reference, my old modem was MPSS.TH.2.0.c1-00229-M8996FAAAANAZM-1 1
Thanks for the list of modems!
My phone no longer connects to the Tmobile network. It will connect to some towers and not others. Did tmobile push some sort of update? Many places I just get no service. I tried flashing the 26s radio, but still no dice. Or is the cell modem in my phone broke?
magic_man said:
My phone no longer connects to the Tmobile network. It will connect to some towers and not others. Did tmobile push some sort of update? Many places I just get no service. I tried flashing the 26s radio, but still no dice. Or is the cell modem in my phone broke?
Click to expand...
Click to collapse
dix you checking your APN settings?
Also *#*#4636*#*# and inside phone sim1 check to see select network LTE/GSM..
Give it a shot
cy-rock said:
dix you checking your APN settings?
Also *#*#4636*#*# and inside phone sim1 check to see select network LTE/GSM..
Give it a shot
Click to expand...
Click to collapse
Yeah apn is right since it can connect to some towers.
magic_man said:
Yeah apn is right since it can connect to some towers.
Click to expand...
Click to collapse
My old APN had connection but it was not good so I updated and it was better.. but it's just my provider.
I suggest you to flash another modem to see if that helps
sky104hk said:
Guys, check out this page for all x820 modem, hope it's help!
https://yadi.sk/d/woKdrlRrv8yhr
Flash it with twrp and reboot.
Click to expand...
Click to collapse
Hello and thank you for your work. I have an X829 and I want to use it with European frequencies including the B20. What version of modem should I flash. Because I don't read Russian. Thanks
None of them. X829 does not support B20 so you will get LTE only in areas with B3 coverage. X820 supports both of them.
Sent from my LEX820 using Tapatalk
Final solution
Dear siijii, I have the same problem.have you find a solution? Thanks
Hi,
Thanks for sharing Modem files.
I just got X820 but for some reason it is not connecting to LTE Band 20.
The ROM it came with is 5.8.019S
The questions are:
1) Is there any hardware difference between International version and Chinese version?
2) can i flash Chinese ROM on my x820 (my mobile has CE0560 written on back cover, so i assume it is international version)
3) When selecting *#*#4636*#*# >> select radio band >> "set GSM/UMTS band" list is empty, so do you think i need to flash modem to get European band profile here?
4) Which modem file should i flash for band 20, the Modem directory i downloaded from your link, has Russian language directory name.s If i use Google translate i can see the directory name with modem files are "For developers" , India, China, Russia & USA. No modem file for Europe which has Band 20 enabled?
Thanks in advance.
Take a look at the backside of your X2. If there is a branding in the downside of it, it isnt a X820. Got the same problem, bought a X820 and became a X829. Luckily, I got B3 here working.
So my lg v30 will connect to LTE on extremely rare cases, any other time it will not. I've been monitoring signal and events through Network Guru. According to it my LTE has a problem attaching. Whatever it is that means. So when it does connect to LTE and I move out of range of one tower, I get Tracking Area Update Failure. What could be causing this? How can I fix it. I've set the APN to the best of my ability, but currently I get message APN settings not available for this user. I can still add an APN and save it, but I have no idea if it actually saves cause I can't view the list of APNs. However even before this APN message I had these problems and I knew for a fact the APN was correct. Any help is appreciated!
What variant do you have
What firmware are you on
What carrier are you using
ChazzMatt said:
What variant do you have
What firmware are you on
What carrier are you using
Click to expand...
Click to collapse
At&t
I am on lineage is
I am using google fi, but since is not fully fi featured its basicay T-Mobile
DTexUS said:
At&t
I am on lineage is
I am using google fi, but since is not fully fi featured its basicay T-Mobile
Click to expand...
Click to collapse
So you have H931 converted to US998 and then with Lineage custom ROM installed.
But you are limited to T-Mobile coverage.
Do you live in good T-Mobile area? For instance my mother doesn't. There's no T-Mobile towers near her.
If you are in a good T-Mobile area, you have two options:
1) Ask in Lineage custom ROM thread how to edit/create APN.
2) For test purposes, sign up for cheap T-Mobile MVNO like Mint to see if you get better "T-Mobile" LTE signal. You're only using T-Mobile anyway... First sign up and get "new" phone number just to get a Mint SIM card for test purposes. If you like it, then port your real phone number over and let the "test" phone account die (it's prepaid, so not much money).
Or any T-MOBILE MVNO which allows you to "Bring Your Own Phone".
ChazzMatt said:
What variant do you have
What firmware are you on
What carrier are you using
Click to expand...
Click to collapse
ChazzMatt said:
So you have H931 converted to US998 and then with Lineage custom ROM installed.
But you are limited to T-Mobile coverage.
Do you live in good T-Mobile area? For instance my mother doesn't. There's no T-Mobile towers near her.
If you are in a good T-Mobile area, you have two options:
1) Ask in Lineage custom ROM thread how to edit/create APN.
2) For test purposes, sign up for cheap T-Mobile MVNO like Mint to see if you get better "T-Mobile" LTE signal. You're only using T-Mobile anyway... First sign up and get "new" phone number just to get a Mint SIM card for test purposes. If you like it, then port you real phone number over.
Or any T-MOBILE MVNO which allows you to "Bring Your Own Phone".
Click to expand...
Click to collapse
I have tried many different carriers, all the same no LTE but gsm/edge works fine. Today I got to my jobs workshop and LTE started working, but as soon as I got into the town I was working in I lost it, LTE attach failure, or Tracking update failure. I'll see what I can do on the APN side of things. But do you have any information as to why it could get LTE sometimes and then other times the LTE attach failure comes up? At this point I'm likely just gonna get a fi compatible phone (Edit: one that has the auto network switching, the v30 is supported just will only work on T-Mobile towers), but just for learning's sake I'd love to figure this out. I looked at the coverage map for T-Mobile and I appear to be in a good area, and both the shop and the town mentioned above seem to be as well. Its almost as if the phone struggles to switch between towers. (I'm no service expert)
(US ATT and T-Mobile)
I have this phone, but only by way of ATT telling me my non-VoLTE 4G LTE phone would not work after ATT shuts down 3G.
I move over to T-mobile recently. All works ok. I then activate VoLTE on the Mi. All works ok.
But I had to call a T-mobile rep regarding my iPhone, in that conversation I asked if VoLTE was even needed, and he tells me no, that T-mobile will still do voice data w/o VoLTE enabled.
So, VoLTE is a feature of LTE and implemented on 4G/5G, and really has nothing to do with 3G being shut down.
There's so many sites stating you "need" VoLTE to keep making voice calls after 3G is gone. This is not true.
"As 3G is switched off, you need VoLTE or HD Voice support to make calls on 4G networks."
Explained: AT&T and T-Mobile VoLTE phone cutoffs
Everything you need to know about AT&T's move over to HD Voice and T-Mobile's transition to VoLTE, and what it means for smartphone calls.
www.androidauthority.com
Click to expand...
Click to collapse
As I understand it you need 3G for voice.
You may be able to use internet service but without VoLTE, no phone service.
If the device is not white listed it likely will not be able to have phone service as your link states.
I have straight talk with AT&T sim, I was using my Black Shark 3 pro which has volte and all of a sudden Friday at midnight, no data or phone service. At that time my bs3pro has been having heating issues, so i moved everything over to my redmagic 6 which has volte. I noticed my sim was locked in apn, totally different apn info than my bs3pro, so i called support, since everytime I tried to make call it blocked calls and sent me to support. The CS person did something on their end, had me restart phone, then service was back to normal and been fine since.
If your service provider only provides 4G infrastructure like mine... then you need VoLTE otherwise no phone calls. They are new and never had any 3G and below infrastructure. I tried making calls .... it doesn't.
My service provider annoyingly doesn't provision volte for my volte capable handphone (this makes my eyes swivel) but does provide an app to support phone calls without volte.. but it chews up battery
@roger_rex
But T-mobile (US) runs 4G and 5G, but # of towers with 5G not as plentiful as 4G. I connect 4G LTE most of the time, voice & data works just fine. T-mobile rep told me it will work w/ or w/o VoLTE enabled on phone. The APN used is the "fast" APN one.
A 5G connection does not negate any benefits from using VoLTE.
Was on phone again today with a T-mobile "tech team supervisor" for a service issue (they accidentally turned off one of my SIM cards). I then asked about VoLTE, he tells me it's no longer needed on T-mobile 4G or 5G LTE, but using VoLTE will still work. He seemed to suggest VoLTE not needed at all on 5G because the speed of the wireless can carry both voice and data fast enough. He also hinted their 4G can do the same.
If you have a fast pipe then you really don't need a side channel for the voice.
But duly noted, everything technical that I have read about on VoLTE, using that feature gives better voice call on any LTE that supports VoLTE. The supervisor also mentioned that "VoLTE" will basically go away at some point.
Pretty sure on 4G LTE you need either VoLTE capability or a 3G connection for voice calls.
Redirect Notice
4G VoLTE will likely be here for a long time as 5G is distance/obstacle limited, the former is very hard to overcome due to the wavelength's physical properties.
@blackhawk
I am not disputing how online info says it's required, I am just copying what T-mobile has told me.
T-mobile store rep tells me VoLTE is not really needed, then their online support supervisor tells me the same thing. So it is for sure confusing.
Call a T-mobile support # and ask.
Why would a 3G/4G-LTE phone have an option to turn off VoLTE?
https://www.republicworld.com/technology-news/mobile/what-is-volte-and-what-it-does-is-5g-volte-know-everything-here.html
ChuckStein123 said:
@blackhawk
I am not disputing how online info says it's required, I am just copying what T-mobile has told me.
T-mobile store rep tells me VoLTE is not really needed, then their online support supervisor tells me the same thing. So it is for sure confusing.
Call a T-mobile support # and ask.
Why would a 3G/4G-LTE phone have an option to turn off VoLTE?
https://www.republicworld.com/technology-news/mobile/what-is-volte-and-what-it-does-is-5g-volte-know-everything-here.html
Click to expand...
Click to collapse
I never paid much attention to this and still have questions but it's back burnered for when I run across it. From what I'm reading the T-mobile reps sound like they don't understand it either.
Even if they don't understand it... the only thing that matters immediately is if it will work. Hopefully that intel is correct!
Really until AT&T implements the change I won't be 100% sure. However pretty sure I'm ok as the devices don't use the 3G band and in hidden user settings VoLTE is toggled on. The only indication other than the 4G that VoLTE is active.
Probably HD too, but no indicator or setting other than very good call quality.
To make matters even more confusing AT&T changed the format and models listed drastically 2 weeks ago from their December whitelist. So small wonder reps might be confused too. Makes you wonder if it was deliberately self serving, an oversight or ongoing system modifications?
So, I have not been paying close enough attention to cellular these days. The cell companies have amassed large sets of licensed bands, probably near 200+ bands between 2G/3G/4G LTE and 5G NR.
Interestingly enough, 5G is not LTE at all. I suspect operators call their crud "5G LTE" to signify they support 5G-NSA or 5G-NR (or both), and, the older 4G LTE.
Some airlines are worried about two cell C bands (n77 and n79) that back up onto aircraft radio altimeter that run 4200-4400Mhz.
VoLTE has a long history, but it seems 5G-NR does not even use VoLTE (because VoLTE is a LTE feature, and 5G is not LTE). Can a 4G/5G phone still use VoLTE? Sure, if the firmware is implemented to use it. Likely will use it if the device connects 4G LTE, but perhaps will not when connected to 5G-NR. It's not clear to me if a device will use both 4G LTE and 5G-NR at the same time, but I suspect not. I mean, you could technically connect a device on 5G-NR for data, and then use VoLTE on 4G LTE for facilitating voice calls.
Some reference links for the interested reader.
5G Frequency Bands & Spectrum Allocations - CableFree
5th generation wireless systems, or 5G, may use existing 4G or newly specified 5G Frequency Bands to operate. Technologies include: Millimeter wave bands (26, 28, 38, and 60 GHz) are 5G Massive MIMO, "Low-band 5G" and "Mid-band 5G" use frequencies from 600 MHz to 6 GHz, especially 3.5-4.2 GHz.
www.cablefree.net
5G NR frequency bands - Wikipedia
en.wikipedia.org
LTE frequency bands - Wikipedia
en.wikipedia.org
List of LTE networks - Wikipedia
en.wikipedia.org
Voice over LTE - Wikipedia
en.wikipedia.org
What is 5G LTE, NR, NSA, and MIMO Technology | How Will 5G RAN be Deployed? | Corning
Learn about 5G deployment including RAN, 5G-NSA, 5G-NR, and what they mean for LTE networks.
www.corning.com
LTE vs NR: Reference signal design
NR downlink reference signals are tailored for specific roles and can be flexibly adapted for different deployment scenarios and spectrum. 5G Training
www.5gworldpro.com
ChuckStein123 said:
@roger_rex
But T-mobile (US) runs 4G and 5G, but # of towers with 5G not as plentiful as 4G. I connect 4G LTE most of the time, voice & data works just fine. T-mobile rep told me it will work w/ or w/o VoLTE enabled on phone. The APN used is the "fast" APN one.
A 5G connection does not negate any benefits from using VoLTE.
Click to expand...
Click to collapse
My understanding on this is that voice was using some 3G or below service. My provider was purely 4G and above - so unless my phone was provisioned by the cell company - no voice calls. I tried & it didn't work. I changed to an older device that they did support via VoLTE and calls worked. I can download an App from the cell company that allows my pixel 2XL to work on their system.
I can only guess T-mobile has 3G and below network infrastructure still. My provider is brand new and never built any 3G stuff and have no intention of rolling out obsolete stuff. VoLTE is annoying in that the provider gets to pick and choose which cellphones they allow (to use a standard protocol)
This may not be 100% - I've been kind of forced into a crash course on this myself over the last few days
@roger_rex - Take a read here
{Guide} QXDM Port activation on Pixel 2 XL, (VoLTE,WoWIFI,CA)
Hi all. First of all I DO NOT PROVIDE ANY KIND OF SUPPORT. YOU ALONE RESPONSIBLE FOR ANY POSSIBLE ISSUES. I wrote this post during my vacation. I know it could be quite handy, but unfortunately/thankfully my primary sources of money are...
forum.xda-developers.com
Pixel 2's all have ability for VoLTE.
A cell operator should not be blocking any phone from using VoLTE.
When you call your provider what do they tell you when you tell them your Pixel 2 has VoLTE for 4GLTE but your Pixel won't make calls on their network?
I can tell you for sure, the operators play games with their support of hardware.
My iphone XS was connecting to ATT with a "5G" icon from time to time, so why does T-mobile say 5G is a "no"? I moved the XS to T-mobile and the phone won't ever connect to 5G, and the APN settings appear to be blocked.
Tutorials | T-Mobile Support
Update: I find many sites that say the Xr and Xs do not support 5G, so now I scratch my head, my Xs would sometimes show "5G" icon for cell wireless, when it was on ATT network. Apparently AT&T supports Xs and 5G, hence the Xs does have 5G capable radio.
Apple iPhone Xs / Xs Max - Signal & Cellular Data - AT&T
Get Apple iPhone Xs / Xs Max support for the topic: Signal & Cellular Data. Find more step-by-step device tutorials on att.com.
www.att.com
ChuckStein123 said:
I can tell you for sure, the operators play games with their support of hardware.
My iphone XS was connecting to ATT with a "5G" icon from time to time, so why does T-mobile say 5G is a "no"? I moved the XS to T-mobile and the phone won't ever connect to 5G, and the APN settings appear to be blocked.
Tutorials | T-Mobile Support
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Click to collapse
I think they go at least partially by number of a given model in use. My guess is it's not a painless procedure for them to configure their system for a given model.
AT&T first listed their Note 10+ variant but not the unlocked variant, a month later it was added as well. It may be a work in progress... it seems sort of helter skelter, oh my gawd get it done, whatever it takes... kind of deal
You know they are catching Berlin air raid volume flack
Before buying Mi 11 Lite 5G I went into a T-mobile store (not an affiliate). I asked if the Mi 11 Lite 5G will work on T-mobile and the rep told me all phones work on T-mobile as long as they are not locked to another carrier, and, the T-mobile freq bands ("channels") are covered by the phone.
Unless LTE or 5G-NR/5G-NSA is improperly implemented on the device, then I don't see why all phones should not work. They should all work.
Think about hotspot. The carrier can control is the device can use that service, or at least can with some devices, but why bother, who cares how the data on the data plan gets chewed up. Go over the plan and get charged. Thus far I have not seen unlimited hotspot data, T-mobile only allows 40G on their Magenta Max plan.
Good thing is, Mi 11 Lite 5G phone (model M2101K9G) works a-ok on T-Mobile USA. I did have to manually set the APN to the "fast" one, and had to use dial code for VoLTE, 4GLTE and 5G works.
Straight talk now keeps shutting off my service every 3 days, last night again, so 3 times now. Call and back working. But seems like they only care about giving me some crappy free phone and seems like they outsource. The redmagic 6 is not on AT&T list, if any more issues I will switch to T Mobile, T Mobile recognized my phone by imei and said it is fully compatible. I Noticed on my Redmagic 6, sim 1 is only 14 digits but sim 2 is 15, so I moved sim card, might be issue, but doubt it.
@Rotwiler I see you posted about the IMEI digit thing in another post/forum. *#06# should reveal a 15 digit IMEI. If it shows only 14 then the phone is hiding one digit. Put sim card in sim slot that has the 15 digit IMEI.
What does *#*#4636#*#* get you? Do some gooling around for activating VoLTE on RedMagic 6
Phone lists for carriers are mostly for support reasons. If the phone has all the cell bands the operator uses, then it should be good to go. If the phone only has some of the cell bands used, then the phone may work ok in one area, but not good in another, all depends on how the operator runs the bands in different areas. The cell operator does not want the support headache for a phone that only has partial bands, "hey ATT, my phone not working in Timbuck-too", etc.
The RM6 appears to have most of the ATT 4GLTE bands (all the major ones), so it should work a-ok on ATT (US). 5G should also work. It appears the RM6 had a firmware update about 26d ago. Make sure the firmware is updated to latest.
Are your APN settings correct?
Program Data Settings for Your Device
Can’t connect to the internet on your mobile device? Here’s how to set up the access point name (APN) to get you going again.
www.att.com
I am using AT&T through Straight Talk. I did move sim card to slot 2 to see if issue was due to sim one showing only 14 digits. Phone is fully updated. Odd thing is I cannot change the APN since this new Volte, there is red check mark and everything is grayed out. I have always been able to modify APN until now. My sim card is really old, used to be full size and over the years cut it down for new phones, is probably 8+ years old, had it since Android phones came out, but has always worked great.
Rotwiler said:
I am using AT&T through Straight Talk. I did move sim card to slot 2 to see if issue was due to sim one showing only 14 digits. Phone is fully updated. Odd thing is I cannot change the APN since this new Volte, there is red check mark and everything is grayed out. I have always been able to modify APN until now. My sim card is really old, used to be full size and over the years cut it down for new phones, is probably 8+ years old, had it since Android phones came out, but has always worked great.
Click to expand...
Click to collapse
APN settings are grayed out when the phone is locked to carrier. Can you at least see what the APN settings are? If the phone is owned outright by you then tell the Straight Talk folks you want the phone unlocked.
As for old sim card, then just go get a new one from the store for a few $, and then move your number to the new sim card via online.
Phone is Redmagic 6 global version, never was locked.