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I lost all signal in my cell phone coverage. I cant call or sms anyone.
I installed the Amberhome Custom Rom v1.1 and all my signal's gone.
Does installing a custom rom screw up signal like this?
where are you located?
Canada, Ontario
Probably the same issue I had with the telus milestone.
When you flash a new rom, it doesn't have the right 3G settings for some reason. You'll need someone to send you those files.
If my theory is correct, your phone works with GSM but not 3G right now. Since Telus does not have any GSM network, it won't find any signal at all.
I'm going on theory here.
Here's the info from the milestone thread
http://forum.xda-developers.com/showthread.php?t=734802
Radio Band Requirements for different countries
Some countries require the original 3G files of your current ROM to work ie. Canada, Brazil, Venezuela, Germany and some others countries uses a different band for 3G. If u dont backup the 4 original 3G Files and restore it over this nandroid once installed u gonna have poor signal, sms problems and HSDPA loss (even if u set apn and get conection its gonna be crappy one).
Files should be in the /system/etc/motorola/bp_nvm_default/ of your phone.
Files can only be copied from OpenRecovery , using adb shell.
Latest v0.5 has builtin install option using GScript , so you can get the radio replaced/installed. without update zip files.
You might check this thread , if a update-nosign.zip file exists for your model. which makes it easier for you to install.
Filenames are:
File_Audio
File_Audio2
File_GSM
File_Seem_Flex_Tables
generic_pds_init
Click to expand...
Click to collapse
EDIT: since these are motorola instructions, they probably wont help you, heh
Im not even using 3g i only have a prepaid account
So you're saying that I cant even use GSM? and that Telus has different GSM files than the rom?
Telus has no GSM/GPRS/EDGE coverge. It has an UMTS/WCDMA/HSPA network. However, unlike most of the world, it is on the 850 and 1900 MHz frequency bands instead of the more common 2100 MHz.
So it is possible that you flashed an update from the rest of the world that messed with your radio configuration.
I solved it
my phone mysteriously came with the "only 2g network" checked in the mobile network settings
i unchecked it and i have signal!
You can also set your phone to "WCDMA only" so that your phone doesn't try to connect to any GSM network.
Hi guys, noob here, just got my first android phone (been with blackberry till now).
I got a chinese X12 dual sim phone because i really needed only 1 phone (had to carry around 2 of them).
Phone works great, only problem is with the mobile networks. It can connect to GSM networks but it won't connect to a 3G network. The phone has 3G capabilities, 3G is enabled for the required sim, it finds the 3G network but it will not connect to it.
Sim works fine, had it in a Samsung i900 on 3G (WCDMA) - i live in Europe.
The thing that surprises me most is that the phone came with android 4.0 instead of the 2.3.6 it was advertised, could this be the problem?
Data Enabled ?! have access points ?!
Taki2011 said:
Data Enabled ?! have access points ?!
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Click to collapse
yes, data is enabled on it, as for the access points it has them too (althought i am only trying to connect to the voice network, not the data network)
Tried one more thing which is wierd: the phone works ok with another 3G sim from another provider, but with the other sim it doesn't connect (but it finds the actual network). And the sim that won't connect works on my old phone (the samsung i900)
The first sim that works on 3G on my new phone is from Vodafone (and they have both GSM and WCDMA in my country), while the other sim that doesn't work is from a provider that only has 3G (for both voice and data).
Quick update:
i found out i also get an "error" : invalid IMEI for both sims - it was this way when i first got the phone...
really strange thing with this phone, in settings > about > it says android version 4.0 but when it starts it has the honeycomb logo...
would appreciate any help, if it's from the missing imei's that would be good (or bad, depending on how hard is that to fix).
You can call ##778# to get into those settings. But be careful, those can really screw up your phone if your not careful.
The only reason i can think of, is if your phone only supports certain UMTS bands, while your operator is using different ones. Check out this article: http://en.wikipedia.org/wiki/UMTS_frequency_bands.
For example, my previous phone HTS Nexus One came in two versions - one for ATT(UMTS 850/1900/2100) and another for T-Mobile(UMTS AWS/900/2100). Both were GSM, both had 3G, but 3G would not work on another operator.
alexander7567 said:
You can call ##778# to get into those settings. But be careful, those can really screw up your phone if your not careful.
Click to expand...
Click to collapse
Tried it. What i get is : USSD code running (for a short while) > unknown application
AntonC said:
The only reason i can think of, is if your phone only supports certain UMTS bands, while your operator is using different ones. Check out this article: http://en.wikipedia.org/wiki/UMTS_frequency_bands.
For example, my previous phone HTS Nexus One came in two versions - one for ATT(UMTS 850/1900/2100) and another for T-Mobile(UMTS AWS/900/2100). Both were GSM, both had 3G, but 3G would not work on another operator.
Click to expand...
Click to collapse
phone has only WCDMA 3G network - i tried it on different carriers (on 3G and not GSM) and it works fine, connects to 3G, it just won't connect to this specific network (although it finds the network there, so i guess it has the hardware to connect to it).
could this be from the lack of the IMEI ?
FIXED !!!!
Got it fixed, the problem was with the missing IMEI codes, put them back in, works like a charm.
I used the tutorial here:
http://club.dx.com/forums/Forums.dx/threadid.1004466?page=2
Thanks for all the replies you guys.
I recently bought the cell phone in US and am visiting India for a couple of months. When I tried using the GSM sims of both vodafone and airtel in in India I wasnt able to make any calls or rceiev any sms, despite of this being a WORLD PHONE.
I even rooted my device and by installing the APN MAnager I was able to install the Vodafone settings and to my surprise
Was able to get its 3g/Data services working.
However the Voice or the sms is still nit working.
The signalbar is showing just fine and so's the data connection symbol. However with the gsm sim in I keep gettin this NON VERIZON SIM ERROR icon on the top left.
Under the settings>MOBILE NETWORKS ive tried changIng them to both GLOBAL and GSM but still no luck yet.
Can anyone help me out with a network/sim unlock method, similar ti the ones avaialable on the tmibile and other phones.
Pretty sure the voice still uses CDMA. I believe that Verizon still only uses the LTE/GSM for data.
Sent from my SCH-I545 using Tapatalk 4 Beta
jmgib said:
Pretty sure the voice still uses CDMA. I believe that Verizon still only uses the LTE/GSM for data.
Sent from my SCH-I545 using Tapatalk 4 Beta
Click to expand...
Click to collapse
If thats true, then it wouldn't truly be a global phone now would it? GSM will work for voice, but you still need verizon's permission. It should work with a verizon sim, but you will pay through the nose. Now I thought the SIM was unlocked but I could be wrong. Also, even if it is unlocked, it still needs to be compatible with the network frequencies. I don't know what frequencies the VZW S4 has but you can google it.
This being a Dual Band mobile These are the bands that it supports..
CDMA 850
CDMA 1900
GSM 850
GSM 900
GSM 1800
GSM 1900
LTE 750
LTE 1700
WCDMA 850
WCDMA 1900
WCDMA 2100
Also on googling I came across some posts which said the people have managed to use there gsm sims in europe n korea and were able to get the voice n sms. For data they too had to play with th APN..
So what I am tryin to make out from this is we don have a solution to get the voice n sms working on gsm network
Pic showing the error message that I get when I try to make a call.
The second oic shows how my Network signals and data signals are showing just fine but still am not able to make any calls or sms.
Sent from my SCH-I545 using xda app-developers app
I used my phone and put in a Straight Talk (AT&T) SIM and it works with data and voice after manually putting in the APN. If Verizon phone works on AT&T network, it should work with any network out there provided that the bands are supported by the phone.
I was under the same impression, as it worked for me too when I used the tmobile(gsm) sim with it. I was able to make calls only and data was restricted.
Where as with Vodafone IND its the other way round. Am not able to make/recieve calls or sms but data 3g is working just fine.
Confused what could the problem possibly be.
Sent from my SCH-I545 using xda app-developers app
was delobta
ashroh said:
I recently bought the cell phone in US and am visiting India for a couple of months. When I tried using the GSM sims of both vodafone and airtel in in India I wasnt able to make any calls or rceiev any sms, despite of this being a WORLD PHONE.
I even rooted my device and by installing the APN MAnager I was able to install the Vodafone settings and to my surprise
Was able to get its 3g/Data services working.
However the Voice or the sms is still nit working.
The signalbar is showing just fine and so's the data connection symbol. However with the gsm sim in I keep gettin this NON VERIZON SIM ERROR icon on the top left.
Under the settings>MOBILE NETWORKS ive tried changIng them to both GLOBAL and GSM but still no luck yet.
Can anyone help me out with a network/sim unlock method, similar ti the ones avaialable on the tmibile and other phones.
Click to expand...
Click to collapse
If rooted, you can use Titanium backup, and freeze 'Setup wizard'.
What good would it do if I freeze the setup..how do you suggest I proceed further after freezing..?
Sent from my SCH-I545 using xda app-developers app
I recall needing to call verizon and get an unlock code for my old droid 2 global so that I could use non-verizon global sim cards in it. I believe you just needed to be a customer in good standing for at least 10 months, and could only do it once a year per line, or something.
Edit: A quick search showed a post claming it is already SIM unlocked, so never mind!
Since only my Data is working on my VZW GS4, that too after rooting and installing titanium and apn Manager.
Just wanted to confirm if I am thinking in the right direction, Is it possible that I may flash the Stock Rom for I9500(international Version) in my vzw GS4, and it would work with any international carrier around the world, cos currently am only able to use the Data/3g and Neither Voice nor SMS is working out here for me for GSM carriers like Vodafone and Airtel.
Id really appreciate if anyone can help me lookup a workaround for this..
I just made to run my port of Android Revolution HD 2.0 for i545 (I was porting it from i9505). Everything is working, except CDMA-networking. It's multilingual as well. If anybody wants - I could give it to test. I asked mike1996 for permission to port it, so it is permitted
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
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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.
few days before i rooted my redmi note 4 , when i reboot the phone i found that jio 4g sim is showing NO SERVICE. i replaced with new jio sim but same problem, even i did all the settings correctly. then i tried airtel 2g/3g it worked fine. i flashed my phone many times with all global roms of different versions, also i flash modem but still nothing happened. so i need some help, please tell me what should i do now?????
Well if you have tried a different SIM from Jio itself and different roms, it should mean that there's probably no 4G connection available where you are.
I have a RN4 (Germany) and I have zero issues with connecting to 4G networks here, even from the prepaid SIMs.