Develop Bugs

[Q] Help Unlocking the Galaxy S III from AT&T to StraightTalk

I've went through hours of research and to no avail feel as thought I've gotten nowhere.
I bought this phone used, with what looks to be from an AT&T carrier previously (based on start up screen). Did not come with original SIM card. I want to be able to use StraightTalk services with it, and have already bought the SIM and is on its way to my house. I also want the ability to uninstall the factory installed apps that AT&T locked onto the phone.
From what I was informed, getting the calls and texts from StraightTalk onto the phone will be a simple task. Using StraightTalks 3G internet however wont work. That's were the unlocking comes in. Unlocking will also let me uninstall those factory apps as well I hope?
Would greatly appreciate any help I could get on this topic and hope that maybe this will help any future views with the issue.
Thank you!!!

No need to unlock. Your data will work fine as long as you adjust apn. To rid your phone of bloatware however you will be required to root. Not unlock.. The iphones are a little different story, but you don't have that so don't worry about it
Sent from my SAMSUNG-SGH-I747 using xda premium

Excellent! Will the APN change take place during the StraightTalk transfer when I put in the new SIM card? Manually, Automatically?
Also, rooting could be potentially dangerous based on what I read. Are There any good guides on this?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Brian9391 said:
Excellent! Will the APN change take place during the StraightTalk transfer when I put in the new SIM card? Manually, Automatically?
Also, rooting could be potentially dangerous based on what I read. Are There any good guides on this?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
- searching is your friend
- forum sections have stickies and pinned threads that answer your questions
- searching even more is your friend

APN change takes place once the StraightTalk SIM has arived. Details are suppose to be provided within shippment.
What I don't understand is, once I put the AT&T Compatible SIM into my phone and transfer my number over, without unlocking the device this is, will the service be provided over AT&T towers?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app

Brian9391 said:
APN change takes place once the StraightTalk SIM has arived. Details are suppose to be provided within shippment.
What I don't understand is, once I put the AT&T Compatible SIM into my phone and transfer my number over, without unlocking the device this is, will the service be provided over AT&T towers?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
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From my understanding it will use att towers.
Sent from my SGH-I747 using xda premium

Brian9391 said:
Excellent! Will the APN change take place during the StraightTalk transfer when I put in the new SIM card? Manually, Automatically?
Also, rooting could be potentially dangerous based on what I read. Are There any good guides on this?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
No, you will have to go into settings, mobile networks, and search when the new sim card is placed in the phone.
Rooting is not dangerous, installing things on the phone that aren't made for it or installing apps from non trusted sources are dangerous.
Brian9391 said:
APN change takes place once the StraightTalk SIM has arived. Details are suppose to be provided within shippment.
What I don't understand is, once I put the AT&T Compatible SIM into my phone and transfer my number over, without unlocking the device this is, will the service be provided over AT&T towers?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Click to expand...
Click to collapse
As long as it is ATT and not TMO sim it will use ATT towers to deliver service to the phone.

[Q] Your SIM card does not allow connection to this network

I have searched XDA forums and there are HUNDREDS of similar posts, still 0 resolves.
I have bought Optimus G and went to my mobile carrier to receive my new MicroSIM. I put it in my device and I had connection for 20 minutes, and I got a red X on my upper right signal indicator. When I try Automatic registration in Settings > Mobile carriers, it searches and says Your SIM card does not allow connection to this network. My PIN code is correctly working and my phone indicates a SIM is inserted, still no connection.
On my lock screen I get - "No service" message next to a SIM icon. Any help appreciated ))

Try manually entering ur network's apn
Sent from my LG-E975 using xda app-developers app

geoworld_200 said:
Try manually entering ur network's apn
Sent from my LG-E975 using xda app-developers app
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Thanks for the response.
I can only enter New APN, and when I do so, my phone only uses those provided by default from carrier/sim and not the newly entered one

Is ur phone rooted and running on a custom ROM?
Sent from my LG-E975 using xda app-developers app

geoworld_200 said:
Is ur phone rooted and running on a custom ROM?
Sent from my LG-E975 using xda app-developers app
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No, I restored it to E975 Europe Open / no root

No sim card and no connection
I have AT&T's LG Optimus G E970 with E975 firmware flashed. When I insert any gsm sim card phone tells that there is no sim card and no connection. I think it happend because of not properly backed up EFS partition. Any user of E970, please send me you EFS!!! I don't know how else I may return my connection back. My e-mail is [email protected]

facing the same problem..

Could be that u guys have incorrect radios?
Sent from my GT-N5110 using xda app-developers app

I had the same problem this week.
I was running savyrom for a couple of weeks without problems, but this week I've got this no service problem.
Avert reflash savyrom v2 (wipe cache and dalvik only), I had a subsystem crash and afterwards kernel crash, even after restore a CWM backup of stock ROM.
First I thought that it was normal because I was in a place with weak signal, but I was not able to connect to the network anymore.
At the moment the phone don't charge because I'm having several kernel crash's.
Sent from my Sony Tablet S using Tapatalk 4

LG optimus F180
Hi, i just want to ask. i own a LG optimus F180L and i'm from philippines. bought it on online store. Now my problem is that i have this korean stuff. and i want to convert it to E975 international version. is there any way to do that?

sushibabaes said:
Hi, i just want to ask. i own a LG optimus F180L and i'm from philippines. bought it on online store. Now my problem is that i have this korean stuff. and i want to convert it to E975 international version. is there any way to do that?
Click to expand...
Click to collapse
Hey, don't post these question anywhere! See this thread for the answer: http://forum.xda-developers.com/showthread.php?t=2434917

MitoTakatori said:
Hey, don't post these question anywhere! See this thread for the answer: http://forum.xda-developers.com/showthread.php?t=2434917
Click to expand...
Click to collapse
sorry. . . deleted. . .

geoworld_200 said:
Could be that u guys have incorrect radios?
Sent from my GT-N5110 using xda app-developers app
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i has the same thought in mind?sounds alot like a problem with either the sim card slot or the radios maybe the antennas are messed up?

[Q] No lte

I am unable to receive lte data on my Nitro on at&t. I have tried every apn I can find with no luck. The area I am in became active with lte last month. Does anyone have any suggestions. I have a stock nitro with ics.

I may be wrong but do you need or have an LTE sim?

audit13 said:
I may be wrong but do you need or have an LTE sim?
Click to expand...
Click to collapse
I just got the sim card this week and was told that lte should be available with it.

eagleshreck said:
I just got the sim card this week and was told that lte should be available with it.
Click to expand...
Click to collapse
Hmm, I wonder why you can't get LTE.
Does the term LTE appear anywhere on the sim card. I'm with Bell Canada and Rogers. Both of the plastic around both of my sim cards said LTE.
You could also try a speed test to see what speeds you're getting.

Are you running stock firmware? Does the LTE stay on, or does it switch off as soon as you turn it on?
I had this problem for a long time. I would turn on LTE, but it would turn back off after I backed out of the menu. I had mine rooted and with a custom ROM. I had to completely wipe and reflash a new ROM several times. Eventually it started working again.

elgiraffe said:
Are you running stock firmware? Does the LTE stay on, or does it switch off as soon as you turn it on?
I had this problem for a long time. I would turn on LTE, but it would turn back off after I backed out of the menu. I had mine rooted and with a custom ROM. I had to completely wipe and reflash a new ROM several times. Eventually it started working again.
Click to expand...
Click to collapse
I am using stock ics, I can't find where to turn on the lte. When i try the 8#*#4636#*#* the set band on phone info doesn't show any options.

Download "lg hidden menu" from play store and try and set the baseband manually . that's the only way I know how to get to that options unless someone from here knows how
Sent from my LG-P930 using xda app-developers app

I know u said u tried every APN just to be sure have you tried this one
Sent from my LG-P930 using xda app-developers app

nizmoboy98 said:
I know u said u tried every APN just to be sure have you tried this one
Sent from my LG-P930 using xda app-developers app
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I did try that apn, and inside hidden menu, these are my network band choices.

Are you sure you have a p930 and not a p936. I have a p936 and I only get edge speeds no matter what frequency I choose . to check which you have take out batter and you should see a sticker p930. If you have a p930 take a Att corporate store and have them mess with it. If you have a p936 it not compatible with Att 3g and 4g
Sent from my LG-P930 using xda app-developers app

nizmoboy98 said:
Are you sure you have a p930 and not a p936. I have a p936 and I only get edge speeds no matter what frequency I choose . to check which you have take out batter and you should see a sticker p930. If you have a p930 take a Att corporate store and have them mess with it. If you have a p936 it not compatible with Att 3g and 4g
Sent from my LG-P930 using xda app-developers app
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It is a p930, I will have to keep messing with it. Unless anyone else has an idea.

eagleshreck said:
It is a p930, I will have to keep messing with it. Unless anyone else has an idea.
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Click to collapse
On A p-930 there is an lte indicator with cm 10.1 correct?

[Q] Enable LTE access on T-Mobile's network

I have an AT&T SGH-I747 running CM11 that I have unlocked and using on T-mobile's network. Unfortunately though I can only access edge and I would like to be able to acces 3g, 4g, or LTE. How would I go about enabling this on my phone? Any help is appreciated.

a sandwhich said:
I have an AT&T SGH-I747 running CM11 that I have unlocked and using on T-mobile's network. Unfortunately though I can only access edge and I would like to be able to acces 3g, 4g, or LTE. How would I go about enabling this on my phone? Any help is appreciated.
Click to expand...
Click to collapse
Seems that the problem could be on the APN... Search for them it should be something like fast.t-mobile.com
Sent from my HTC One using xda app-developers app

TopoX84 said:
Seems that the problem could be on the APN... Search for them it should be something like fast.t-mobile.com
Sent from my HTC One using xda app-developers app
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I have tried several different APN's and none have worked/given me anything more than edge.

a sandwhich said:
I have tried several different APN's and none have worked/given me anything more than edge.
Click to expand...
Click to collapse
My tmobile APN settings... Note - I have an unlocked AT&T HTC ONE
Sent from my HTC One using xda app-developers app

TopoX84 said:
My tmobile APN settings... Note - I have an unlocked AT&T HTC ONE
Sent from my HTC One using xda app-developers app
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I have tried that one out and nothing has changed. Still stuck on edge. Thanks for the suggestion though.

I used to work for t-mobile and that's the LTE APN...
check on their website the LTE coverage areas around you.
Make a backup of your device and attempt a factory reset.
there were some devices I worked with that the factory reset worked like a magic trick.
Sent from my HTC One using xda app-developers app

TopoX84 said:
I used to work for t-mobile and that's the LTE APN...
check on their website the LTE coverage areas around you.
Make a backup of your device and attempt a factory reset.
there were some devices I worked with that the factory reset worked like a magic trick.
Sent from my HTC One using xda app-developers app
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I can't really do a factory reset, as I am currently running CM11 and I was previously on ATT. My friend on Tmobile get's LTE coverage here so I would assume I would be capable of that as well. Or at least get 3g coverage.

a sandwhich said:
I can't really do a factory reset, as I am currently running CM11 and I was previously on ATT. My friend on Tmobile get's LTE coverage here so I would assume I would be capable of that as well. Or at least get 3g coverage.
Click to expand...
Click to collapse
I read some old topics where upgrading TWRP or CWM to the latest and 're-flashing was solving the LTE issue this was about 3-4 months ago
Sent from my HTC One using xda app-developers app

TopoX84 said:
I read some old topics where upgrading TWRP or CWM to the latest and 're-flashing was solving the LTE issue this was about 3-4 months ago
Sent from my HTC One using xda app-developers app
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Hmmm, ok. I have the second to most recent CWM and I reflashed to CM11 again just this morning. Still don't have access.

S3 no reception?

My friend got a phone from T-Mobile s3 few weeks ago and unlocked it to use it here in Canada in mobilicity network. But it has like 0 reception it gets reception for few mins than goes to 0 bars. Is it a radio issue or something else? Any help would be greatly Appreciated. Thanks!
Sent from my SGH-I317 using xda app-developers app

Are you sure the unlock was successful? Im not sure how it works in Canada but could it be blacklisted?
While it shows signal does it work for calls and data?
Sent from my SGH-T999 using Tapatalk

Yes unlock was successful and recognize the network. Gets reception you can make call after few mins loses it and goes to 0 it's not blacklisted as it was purchased outright from the retail store. Right now there is no Sim card on phone and it shows 4 bars.
and for some reason this is the newest s3 i think cause usually its t999v this one say t999l
DocHoliday77 said:
Are you sure the unlock was successful? Im not sure how it works in Canada but could it be blacklisted?
While it shows signal does it work for calls and data?
Sent from my SGH-T999 using Tapatalk
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Sent from my SGH-I317 using xda app-developers app

Yes unlock was successful and recognize the network. Gets reception you can make call after few mins loses it and goes to 0 it's not blacklisted as it was purchased outright from the retail store. Right now there is no Sim card on phone and it shows 4 bars.
DocHoliday77 said:
Are you sure the unlock was successful? Im not sure how it works in Canada but could it be blacklisted?
While it shows signal does it work for calls and data?
Sent from my SGH-T999 using Tapatalk
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Click to collapse
Sent from my SGH-I317 using xda app-developers app

You might need a new sim card. And the T999V is only sold by the Canadian carriers. The T999L is the updated lte model of the original T999.
After unlocking were you able to use a sim from another carrier and have it work with zero issues? If you only tested it on the network you are reporting problems with that is not confirmation of a successful unlock. Try a sim from another carrier and see if it works.
If it is unlocked then it sounds like an old sim card type issue.
Sent from my SGH-T999 using Tapatalk

*please ignore*

DocHoliday77 said:
You might need a new sim card. And the T999V is only sold by the Canadian carriers. The T999L is the updated lte model of the original T999.
After unlocking were you able to use a sim from another carrier and have it work with zero issues? If you only tested it on the network you are reporting problems with that is not confirmation of a successful unlock. Try a sim from another carrier and see if it works.
If it is unlocked then it sounds like an old sim card type issue.
Sent from my SGH-T999 using Tapatalk
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just tried my sim card same issue and we tried with 2 other brand new sim card from ssame provider. i just flashed this March 2014 - 4.3 JellyBean - New!
Note: This is based off of the stock image TMO T999LUVUBNC1
Download :: Download - root66_TMO-L_T999LUVUBNC1.7z through odin thought it might be radio issue but same thing.
her daughter has the same s3 with 4.1.2 and works perfect. can i downgrade through odin to 4.1.2? i think md5 modem might be better.

Unfortunately no. Once you flash 4.3 there is no going back. If its not working with any of the sim cards, try one from another carrier if possible.
Kinda sounds to me like its not unlocked. How did you go about attempting to get it unlocked?
Sent from my SGH-T999 using Tapatalk

She will come to pick the phone today I'll ask how did she unlock the phone. But if it wasnt unlocked how does it recognize the Sim? Can you suggest me a modem? But I will ask how she unlock it and let you know. Also when I flash the new 4.3 it didn't erase the call history and also when I reset the phone it doesn't seem like it resets it cause the call history's are still there.
DocHoliday77 said:
Unfortunately no. Once you flash 4.3 there is no going back. If its not working with any of the sim cards, try one from another carrier if possible.
Kinda sounds to me like its not unlocked. How did you go about attempting to get it unlocked?
Sent from my SGH-T999 using Tapatalk
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Sent from my SGH-I317 using xda app-developers app

sofia-captivate said:
She will come to pick the phone today I'll ask how did she unlock the phone. But if it wasnt unlocked how does it recognize the Sim? Can you suggest me a modem? But I will ask how she unlock it and let you know. Also when I flash the new 4.3 it didn't erase the call history and also when I reset the phone it doesn't seem like it resets it cause the call history's are still there.
Sent from my SGH-I317 using xda app-developers app
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You can only use the 4.3 modems now. When you flash firmware it doesnt erase your data. Not sure why it didnt on a factory reset though, unless its stored on sd.
Sent from my SGH-T999 using Tapatalk