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[Q] Galaxy SII i727R carrier problem

Hello,
I bought the phone from Kijiji and it is stated as unlocked. When I put in my Virgin Mobile sim card it shows I have full bars and connected to the Virgin network and di not ask for an unlock code so should be unlocked? Now with the full service bars I have no data connection indicator and everything is on and the APN for Bell/Virgin is inputted in it already. But I cannot send or receive anything or use any data. Says network error.
Any help?
Thanks,
Jay

jaywiseman said:
Hello,
I bought the phone from Kijiji and it is stated as unlocked. When I put in my Virgin Mobile sim card it shows I have full bars and connected to the Virgin network and di not ask for an unlock code so should be unlocked? Now with the full service bars I have no data connection indicator and everything is on and the APN for Bell/Virgin is inputted in it already. But I cannot send or receive anything or use any data. Says network error.
Any help?
Thanks,
Jay
Click to expand...
Click to collapse
Are you sure Virgin is a GSM carrier? I'm pretty sure they are CDMA only..

lingowistico said:
Are you sure Virgin is a GSM carrier? I'm pretty sure they are CDMA only..
Click to expand...
Click to collapse
Virgin mobile no longer supports CDMA. They are 3G and 4g lte only now.
I have tried the virgin radios and different Rogers and AT&T. Even telus and tmobile radios but none worked.
When I put the SIM in it says its on virgin and connected but no 3G or lte logo and can't send or recieve texts or use anything with data.

jaywiseman said:
Virgin mobile no longer supports CDMA. They are 3G and 4g lte only now.
I have tried the virgin radios and different Rogers and AT&T. Even telus and tmobile radios but none worked.
When I put the SIM in it says its on virgin and connected but no 3G or lte logo and can't send or recieve texts or use anything with data.
Click to expand...
Click to collapse
I'm not convinced, are you sure they're off CDMA now? You need GSM fot texts and on this phone in general. 3G and LTE is not the same.

lingowistico said:
I'm not convinced, are you sure they're off CDMA now? You need GSM fot texts and on this phone in general. 3G and LTE is not the same.
Click to expand...
Click to collapse
This is virgin mobile canada. They only have 3G and LTE service here. I have had the S3, iPhone, and many other GSM phones no problems. Recently the Note 1 LTE. Not sure what is going on. It doesnt say to input an unlock code when I put in the SIM so it must be unlocked?

jaywiseman said:
This is virgin mobile canada. They only have 3G and LTE service here. I have had the S3, iPhone, and many other GSM phones no problems. Recently the Note 1 LTE. Not sure what is going on. It doesnt say to input an unlock code when I put in the SIM so it must be unlocked?
Click to expand...
Click to collapse
If if shows the carrier name and doesn't ask for a code then it's unlocked. Did you try Bell radios? Virgin Canada uses the Bell network and does indeed prefer lte and hspa to cdma as you said.

lingowistico said:
If if shows the carrier name and doesn't ask for a code then it's unlocked. Did you try Bell radios? Virgin Canada uses the Bell network and does indeed prefer lte and hspa to cdma as you said.
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Click to collapse
The only one I could find was the bell radios for the note and it flashed successfully but still the same issue. do you recommend any?

jaywiseman said:
The only one I could find was the bell radios for the note and it flashed successfully but still the same issue. do you recommend any?
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Click to collapse
Try the ones here. It seems like it's something else though. Try wiping data & cache & dalvik cache in recovery or doing a factory reset in settings. Try flashing a stock JB rom in Odin or any other rom for that matter. Try flashing a rom in recovery. Just be aware that JB roms need JB modems. JB modems are backwards compatible with ICS and GB roms. The two official JB modems are RUXUMA7 and UCMC1. There are JB modems from other devices that work on our phone as well, but you'll have to find them yourself as I don't remember.

lingowistico said:
Try the ones here. It seems like it's something else though. Try wiping data & cache & dalvik cache in recovery or doing a factory reset in settings. Try flashing a stock JB rom in Odin or any other rom for that matter. Try flashing a rom in recovery. Just be aware that JB roms need JB modems. JB modems are backwards compatible with ICS and GB roms. The two official JB modems are RUXUMA7 and UCMC1. There are JB modems from other devices that work on our phone as well, but you'll have to find them yourself as I don't remember.
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Click to collapse
thanks. Will try them and let you know.

lingowistico said:
Try the ones here. It seems like it's something else though. Try wiping data & cache & dalvik cache in recovery or doing a factory reset in settings. Try flashing a stock JB rom in Odin or any other rom for that matter. Try flashing a rom in recovery. Just be aware that JB roms need JB modems. JB modems are backwards compatible with ICS and GB roms. The two official JB modems are RUXUMA7 and UCMC1. There are JB modems from other devices that work on our phone as well, but you'll have to find them yourself as I don't remember.
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Click to collapse
Ok I tried everything you mentioned in the post. Still no luck. Tried the ROM you are using on your i727 that you have listed in your siggy. I really like it but still just comes up with "BELL" and no data and cant text or do anything.

jaywiseman said:
Ok I tried everything you mentioned in the post. Still no luck. Tried the ROM you are using on your i727 that you have listed in your siggy. I really like it but still just comes up with "BELL" and no data and cant text or do anything.
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Click to collapse
That's a problem. I really don't know how to help you. One thing you can do is compare Virgin Canada's hspa & lte frequencies with Skyorckets default ones and see if they match.
These are the default frequencies on the Skyrocket.
3G Network - HSDPA 850 / 1900 / 2100
4G Network - LTE 700 MHz Class 17 / 1700 / 2100
Click to expand...
Click to collapse

lingowistico said:
That's a problem. I really don't know how to help you. One thing you can do is compare Virgin Canada's hspa & lte frequencies with Skyorckets default ones and see if they match.
These are the default frequencies on the Skyrocket.
Click to expand...
Click to collapse
Bell
including
Virgin Mobile
PC Mobility
2G
CDMA 850/1900
EVDO 850/1900
3G (and fake 4G)
HSDPA 850/1900
HSPA+ 850/1900
UMTS 850/1900
WCDMA 850/1900
1x EV-DO CDMA2000
4G
LTE 1700

jaywiseman said:
Hello,
I bought the phone from Kijiji and it is stated as unlocked. When I put in my Virgin Mobile sim card it shows I have full bars and connected to the Virgin network and di not ask for an unlock code so should be unlocked? Now with the full service bars I have no data connection indicator and everything is on and the APN for Bell/Virgin is inputted in it already. But I cannot send or receive anything or use any data. Says network error.
Any help?
Thanks,
Jay
Click to expand...
Click to collapse
Jay, I had to unlock my phone myself with I bought it. I use Fido in Canada. After upgrading to include data for the first time, I had a similar problem. Everything looks fine but I had no Internet. I advice you to put your sim card in a Virgin phone already running with no problem and see whether the issue was is with your plan. Sometimes the carrier screws it up as well.

Help! Selected USA Band and now totally no signal

Dear all, I have M8sd China telecom version. Flashed M8st Rom to try and working but no 4g. So tried pressing *#*#4636#*#* and selected USA Band. No signal detected. Factory reset and restored M8sd backup didn't help. Still without any signal. Please help!

I Have the same problem

I have enabled other band selection (other than USA and 800mhz) from the unlocking band in the Sony thread. Chosen Euro band and is working normally now.

Here is the link. http://forum.xda-developers.com/showthread.php?t=2871269

S6 Edge At&t unlocked No update and LTE signal

Sir I purchased a new unlocked S6 Edge ( 925A) at&t device from abroad to use in india.
The guy told it's fully unlocked and it support any sim card. Buy when I checked with Indian Sims I am getting only 2g signals .. I am not getting 3G and 4g signals..
When I checked for network selection mode settings it's missing in the settings.
No software OTA update is available. . I think it's also disabled.. when I checked the device status it is in "custom"..
So if I flash a stock ROM with Odin will it lock again ?
Do I need to unlock it again.. ??

First check the model from bootloader, if its actually a att variant then you can flash a stock rom too make it work as normal, but if its some other variant then get back to this thread again.

Its surely an at&t Variant of Samsung Galaxy S6 EDGE.. its model number is 925A.. which is only available for ATT..
Its baseband version is G925AUCU1AOCE
I purchased this phone as fully unlocked from UAE but in india when i start to use it i came to know that its not taking 3G and 4G signals .. but 2g Signal and Data services are working fine..
I got the phone in rooted condition without any Boot animation of At&t. Since its rooted i am not getting any official updates.
I am also facing many software bugs.. from different apps..
So really want to flash the phone with a new stock rom for using it..
I have some doubts about it please clear it..
1) if i flash it with an official att stock rom will it lock again for att network ?
2) can i remove the att boot animation after flashing with stock rom ?
Sent from my SM-925A using XDA Free mobile app

Providers in India use bands 3, 40, and 41 for LTE. The AT&T S6 Edge is only compatible with band 3.
I doubt you'd be able to flash a different ROM, and even if you could, you still wouldn't have compatibility with bands 40 or 41.

Firstly Thanks for your reply.. i know that S6 Edge at&t only support Band 3 LTE cuz it's a FDD LTE supported device.. in my country here providers are using both TDD & FDD LTE bands for LTE..
In my region "Kerala" at presently all the providers are using Band 3 which is compatible will my phone. But i am not receiving any LTE and 3G signals..
My friends have different unlocked phones from T-Mobile they are not facing any problem..
I am still doubt the flashing ROM.. i am going to flash the stock rom for at&t.. it's the only official rom available for my device.

It could be an APN issue. Make sure the settings are the same as your friends are using. Beyond that, I have no idea.

Nothing Wrong with the APN.. cuz i am using 2G data without any problems.
We have same APN for all 2G ,3G & 4G..
I think its the problem with my software..
I can't switch between LTE/WCDMA/2G because that network mode selection option is disabled or not available..
I am compelled to flash a new Rom..
I don't have any other options.
I own a good phone but i can't use it . Really sad about it..

for sure people here can help you more on this
http://forum.xda-developers.com/galaxy-s6-edge

I have my s6 Edge in Fully unlocked condition with Root Access also..i purchased it as unlocked from Dubai. But i cant find any Network Selection mode in my settings. Itz a ATT variant with model number 925A. The device is not taking 4G signals in india. Also there is no Network selection option in the settings to toggle between 3g & 4G..
Please help me?

LTE and 3G not working anymore on G930T

Hello guys,
I got a Samsung Galaxy S7-G930T T-Mobile, and since yesterday, 4g and 3g aren't working anymore and my phone is showing 2g only...
I have already checked the settings and it is on LTE/3G/2G, and I have also checked the APN settings and they are good..
I have done a factory reset = didn't work
I have reinstalled the firmware = didn't work either..
I have checked if it was the SIM card problem by testing it on another 4g phone, and 4g worked perfectly..
The problem on my phone is that when i'm trying to force 3g only or 4g only, I lose all the signal (i can't even make phone calls) until I use 2g again..
So the problem is that my phone isn't supporting 3g or 4g anymore but only 2g..
Phone model number: SM-G930T
Android version : 7.0
Baseband version: G930TUVU4BQG5
Build Number : NRD90M.G930TUVU4BQG5
Thank you guys for helping me..

were u able to resolve it. i'm in a similar situation
penaimr said:
Hello guys,
I got a Samsung Galaxy S7-G930T T-Mobile, and since yesterday, 4g and 3g aren't working anymore and my phone is showing 2g only...
I have already checked the settings and it is on LTE/3G/2G, and I have also checked the APN settings and they are good..
I have done a factory reset = didn't work
I have reinstalled the firmware = didn't work either..
I have checked if it was the SIM card problem by testing it on another 4g phone, and 4g worked perfectly..
The problem on my phone is that when i'm trying to force 3g only or 4g only, I lose all the signal (i can't even make phone calls) until I use 2g again..
So the problem is that my phone isn't supporting 3g or 4g anymore but only 2g..
Phone model number: SM-G930T
Android version : 7.0
Baseband version: G930TUVU4BQG5
Build Number : NRD90M.G930TUVU4BQG5
Thank you guys for helping me..
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Click to collapse

930F modem for 930S

I bought 2nd SK Telecom unit (930S), which has same SoC as 930F. Is it possible to flash 930F modem to 930S? I get this issues regarding mobile network in LTE doesn't work well, I have to lock it to WCDMA in order to make network run again. I suspect this as modem issues, but is it? Or is this OS problem? Tried 3 carriers, problem persists.

While they are the same SoC, there are some differences that will make flashing G930F over G930S result in bootlooping.
I assume you're not in South Korea?
The firmware will be configuring for Korean carrier / networks. Your best bet would be flashing TWRP, then using this to change your device to your carriers CSC https://forum.xda-developers.com/s7-edge/development/utility-flashable-csc-selection-30-t3392957

lasbrujazz said:
I bought 2nd SK Telecom unit (930S), which has same SoC as 930F. Is it possible to flash 930F modem to 930S? I get this issues regarding mobile network in LTE doesn't work well, I have to lock it to WCDMA in order to make network run again. I suspect this as modem issues, but is it? Or is this OS problem? Tried 3 carriers, problem persists.
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Click to collapse
It could be the stock ROM on there (with sk apps). When I bought mine I immediately flashed TWRP, NAND backup and flashed a custom TW ROM and had zero network issues. I never bothered seeing if the stock ROM was worth using. I'm using BlackPearl with zero problems with network or otherwise on AT&T.

I should clarify many custom ROM's work on goth 930F and 930S, but stock 930F images will bootloop a 930S.

hello, im using g930s too with g930s stock bootloader and baseband/modem. but with hyper alvi 4.1 rom. still got problem in 4G mobile network signal. should i try to change csc or modem file? i think the csc was from wrong country, could that be the culprit? thanks guys