I seem to have a slightly odd problem, in areas where O2 is now providing 900 MHz 3G in addition to the older 2100 MHz my 3G data pretty much stops working unless I change settings in the service menu to only use 900 MHz 3G in which case it works fine. The problem then is anywhere that 900 MHz 3G is unavailable I obviously lose 3G service unless I re-enable 2100 MHz in the service menu.
If only 2100 MHz 3G is available and I set it back to default then data works without any problems, but returning to an area offering both causes data to stop working within minutes. It would appear that it always uses the 2100 MHz band when both are available if that makes any difference.
I have tried several different modems to no avail, and returning the phone to latest stock firmware for the UK. Doing the latter seemed to help, until I rooted the phone using Doomlords script at which point it stared playing up again. That might just be coincidental, I really don't know.
From searching around various places I couldn't find anyone experiencing similar issues, unless my search skills are failing badly. I guess it leaves me with two questions, firstly any ideas on why this is occurring?
And secondly is it possible to set an order of preference for 3G bands anywhere, as I couldn't find anything in the service menus to do that. Based on how the phone is behaving I'd imagine if it used the 900 MHz band as a preference where available the problem might go away.
Related
Does anyone know how to configure the way the phone lock to the different frequency towers? I.e. can we create a rule on how it works out which band it uses first.
i.e. In my area, i can get 2G, 3G and 850 WCDMA 3G. I want to configure my mobile to use the priority in order of
1. 2G
2. 850 WCDMA 3G
3. 3G
Anyone knows how to do this? Thx.
You can't control this as the towers tell the phone priorties. If everyone could choose whatever is "best" - say 2G - then the 2G channel would be jammed and then the 3G channel would be sitting idle.
The base station and the phone communicate and then mutually switch frequencies or channels.
You can manually lock the phone to 2G of-course then manually switch to 3G if/when you need speeds or something.
There are very valid reasons to be able to control how the signal is acquired. Some areas where 2G and 3G signals overlap, you may find that the 3G signal is weaker or problematic and you want the phone to hold on to 2G. It could be a particular band, i.e. 850MHz or 1800MHz.
Sometimes a particular 3G band is faulty so we need to exclude it.
Didn't say you didn't have valid reasons, hell i lock my phone to 850mhz when i'm using the stock ROM but on CyanogenMod can't do it. One reason why I did it is because 850mhz is stronger (obviously) but for some reason AT&T is camping everyone in the area on 1900. I'm guessing they are doing some LTE work on the 850mhz frequency so they push everyone off it to do the work needed but when I manually force it back to 850 calls work just as normal
Anyways, you can manually choose em using the network codes as I said, you just can't set up preferences as you so desire as that's controlled by the network, even if it's for reasons as mentioned. You can just disable 1900mhz and therefore only get 3G on 850 but if you go in an area where there's no 850 license then you wont have cell coverage.
I got my vibrant unlocked and I have it running on At&t. I switched it over because At&t is the only provider that gets signal at my work.
My question is this...I am not getting AS GOOD of reception as people that are using phones that were designed for the At&t network. I actually am getting 3G, but again, it drops back to edge more frequently.
Is there anything I can do that will enhance my signal? Are there any radios, I can flash that might help?
The vibrant only gets 1700 (AWS) Mhz, 1900 Mhz, and 2100 Mhz for 3g. It does not support 850 Mhz UMTS, which is also used by AT&T. If you are in an area that does not use 1900 Mhz, you would not get 3g from AT&T.
You can try flashing different modems and see which one would work best. This pretty much is a hardware limitation of the vibrant, as it supports only one of the two UMTS bands AT&T uses.
I just received a new Android phone from China that was advertised as having support for GSM 850/900/1800/1900 & WCDMA 850/2100 with GPRS/EDGE/HSDPA data capabilities. However I'm only connecting to AT&T on 2G GPRS data at around max 50 kbps. Occasionally I will see an EDGE "E" for a few seconds only to have it disappear. I have tried the phone in several locations where I know there is both good EDGE coverage as well as 850 MHz 3G/HSPA towers but the phone isn't seeing anything. I've tried every setting change as well as a new SIM to no avail.
Does anyone know if there is an app or potentially a dial command, terminal command line utility or external program that can query an android phone to see which GSM/WCDMA bands are supported in the chipset/baseband?
Thanks, Kav
Kavik said:
I just received a new Android phone from China that was advertised as having support for GSM 850/900/1800/1900 & WCDMA 850/2100 with GPRS/EDGE/HSDPA data capabilities. However I'm only connecting to AT&T on 2G GPRS data at around max 50 kbps. Occasionally I will see an EDGE "E" for a few seconds only to have it disappear. I have tried the phone in several locations where I know there is both good EDGE coverage as well as 850 MHz 3G/HSPA towers but the phone isn't seeing anything. I've tried every setting change as well as a new SIM to no avail.
Does anyone know if there is an app or potentially a dial command, terminal command line utility or external program that can query an android phone to see which GSM/WCDMA bands are supported in the chipset/baseband?
Thanks, Kav
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either misadvertised or you misunderstood the ad. If you do some research on those china knock off phones you'd know that they basically don't support any 3G or higher spectrum except the weird ass **** they use in china. I was tempted to buy one of those phones until I discovered that. If you don't like it I suggest returning it asap.
Hello Everyone,
OK, let me explain myself. I live in Dominican Republic, and over here we have 3 major telephone companies: Viva, Orange Dominicana and Claro Dominicana.
Each operates within their own frequency spectrum and some have compatible bands, BUT, when it comes to 3G connection, the problems arise.
SO:
Frecuency Bands for CDMA, GSM, 3G and 4G (Orange Dominicana)
CDMA N/A
GSM/EDGE 900 MHz / 1800 MHz / 1900 MHz
3G 900 MHz
4G 1800 Mhz (Band 3)
Frecuency Bands for CDMA, GSM, 3G and 4G (Claro Dominicana)
CDMA 1900 Mhz
GSM/EDGE 850 MHz / 1900 MHz
3G 850 MHz
4G 1700 Mhz / 2100 Mhz (Banda 4 AWS)
As you can see, 3G for Orange operates on 900MHz and 3G on Claro operates on 850Mhz (though they have compatible 1900MHz band, all good here). This means that the signal will not be recieved and 3G(as in H and H+ if not mistaken) will not be available if your phone does not have the appropiate radio reciever(i think). I own a At&t Samsung Note 3 (SM-N900A) and the bands that the phone recieves are:
GSM: 1800, 1900 MHz
UMTS: 900 MHz
4G: 1800 MHz (Band 3)
First off, as I am writing this post, have noticed that i have most bands compatible except 4G LTE (Yet when i connect to the network, my phone will not display: E+, H or H+ over the data icon in the notification bar, it only shows E). Second, for more background data, i will at the end of the post type the relevant information from the "about device" tab on settings. Third, my question is NOT related to hardware, if I have to get new hardware to achieve what i am looking for then I'd just get a new phone (Why not get a phone and not go through this hassle? I like to run out of option before doing drastic measures and i like projects).
Here goes: Can I, somehow software related, modify the phone's ability to pick up 4G LTE? also, Can I, somehow software related, modify the phone's ability to pick up 850MHz in the GSM band WITHOUT loosing the 900Mhz that i currently get?(because i get great internet, but not everywhere). ANY way you know that this is possible is welcome, no matter how drastic it may seem.
I have kinda advanced knowledge on technological things and I am willing (if pointed in the right direction) do my homework.
Thanks in advanced.
Phone specs:
SAMSUNG SM-N900A
ANDROID VERSION: 5.0
BASEBAND VERSION: N900AUCUEOC2
BUILD NUMBER: LXR21V.N900AUCUEOC2
It is NOT rooted, and I (don't know previous owners) have not updated the phone's software
One thing to keep in mind is that the phone has a locked bootloader and AT&T never released a full ROM after 4.1.1. All updates to the phone were released as OTA updates.
OTA???, and what happens if the bootloader is locked? What is restricted by this?
Edit: just G'd bootloader, so the only way to do this is through custom ROM, BUT since the bootloader is locked, then im f*ckd?
Locked bootloader means no twrp, Cwm, or philz.
OTA=over the air.
I'm not sure if having a locked bootloader will prevent you from adding frequencies but it certainly won't help since safestrap is the only recovery that I have seen on the n900a.
Kinda wierd to ask since it might not be possible but: Cant I pretend to be ATT to the phone, perform an OTA update and opening the bootloader? I know its not that simple but what the hay
Wondering if anyone else has network issues with their BC72 in Canada. I'm on the fido network which means no 5g.
The phone works absolutely fine on wifi, but throw in a sim card and the problems are as follows:
Phone randomly freezes with the screen off, needing a manual reboot.
Camera fails to start half the time
Calls drop, texts fail to send
Apps take ages to open or freeze during use
All of this is intermittent so it can work fine for hours then become basically unusable.
I know this is the Chinese version so I'm wondering if flashing the ROM would help? Thanks in advance
dajee said:
Wondering if anyone else has network issues with their BC72 in Canada. I'm on the fido network which means no 5g.
The phone works absolutely fine on wifi, but throw in a sim card and the problems are as follows:
Phone randomly freezes with the screen off, needing a manual reboot.
Camera fails to start half the time
Calls drop, texts fail to send
Apps take ages to open or freeze during use
All of this is intermittent so it can work fine for hours then become basically unusable.
I know this is the Chinese version so I'm wondering if flashing the ROM would help? Thanks in advance
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What bands does Fido use?? Also sounds like a faulty phone tbh...mind you I'm in the US with the same device
Ainz_Ooal_Gown said:
What bands does Fido use?? Also sounds like a faulty phone tbh...mind you I'm in the US with the same device
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according to the fido forums
GSM ~ EDGE (2G) ~ on band 5 (850MHz).
UMTS or WCDMA ~ HSPA (3G) / HSPA+ (4G) ~ on band 5 (850 MHz).
To access LTE, the device must be compatible with one or more of the following:
700 MHz on Band 12;
850MHz on Band 5;
1900 MHz on Band 2, Band 25;
1700/2100 MHz on Band 4, Band 66;
2600 MHz on Band 7.
Fido doesn't offer 5G
I’ve been using this phone in Canada for years but I don’t have these issues. The CN firmware has different Google services including the phone and text app and also the camera app. Also it’s always trying to connect to servers in China but it’s extremely slo in Canada. You can flash a TW firmware and I’ll be good. Flashing stock firmware doesn’t require root or unlocking. Also I was with Fido before and the LTE bands seemed okay since I never experienced a signal issue.