Develop Bugs

Use other carrier on lost unlocked att phone

Hey,
I bought a phone which was reported lost to att. Fortunately, it was unlocked by att before it got lost. Now I am trying to use that phone with other carrier such as Tmobile. But the problem I am facing is as soon as I turn off the aeroplane mode i get att's signals even there is no sim card inserted. And this is letting att to track my device (maybe?). So how should i gey rid off those signal that works with sim card... And i also want to use some other carrier on it.
Thanks for the replies. I have currently rooted the phone and installed Ariel ROM.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

Boss2212 said:
Hey,
I bought a phone which was reported lost to att. Fortunately, it was unlocked by att before it got lost. Now I am trying to use that phone with other carrier such as Tmobile. But the problem I am facing is as soon as I turn off the aeroplane mode i get att's signals even there is no sim card inserted. And this is letting att to track my device (maybe?). So how should i gey rid off those signal that works with sim card... And i also want to use some other carrier on it.
Thanks for the replies. I have currently rooted the phone and installed Ariel ROM.
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Click to expand...
Click to collapse
Find T-Mobile's APN settings and replace any existing AT&T ones with them.

DarthDerron said:
Find T-Mobile's APN settings and replace any existing AT&T ones with them.
Click to expand...
Click to collapse
Thanks for replying. I don't know how to do it but i guess google might help.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

I went in to phone information and selected gsm only.. But still as soon as i turn off aeroplane mode there are sihnal bars even without any simcard... I don't need that signals.. Help guys!
For changing APN settings, i gotta turn off aeroplane mode and insert some simcard which i would get later to try..
Sent from my SAMSUNG-SGH-I747 using Tapatalk

Boss2212 said:
I went in to phone information and selected gsm only.. But still as soon as i turn off aeroplane mode there are sihnal bars even without any simcard... I don't need that signals.. Help guys!
For changing APN settings, i gotta turn off aeroplane mode and insert some simcard which i would get later to try..
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Click to expand...
Click to collapse
By aeroplane mode do you mean Airplane mode? For APN you should just be able to go to Settings>More...> Mobile Network> Access Point Names, however might be a little different since I'm running stock and you're probably still on touchwiz.

Interesting problem.

I wondering if someone can help me. My Bell S3 can longer connect to 3g HSDPA or LTE I've tried about 8 different ROMs. So bizzare. Does anyone have an idea about this?
Sent from my SGH-I717 using Tapatalk 2

bhundt said:
I wondering if someone can help me. My Bell S3 can longer connect to 3g HSDPA or LTE I've tried about 8 different ROMs. So bizzare. Does anyone have an idea about this?
Click to expand...
Click to collapse
Are your APN settings correct (Settings -> Other -> Mobile networks -> Access point names)?
Do you have the right network type set (in Mobile networks as above, or by dialing *#*#4636#*#* and looking in Phone info under Set preferred network type)?

Similar problem
bhundt said:
I wondering if someone can help me. My Bell S3 can longer connect to 3g HSDPA or LTE I've tried about 8 different ROMs. So bizzare. Does anyone have an idea about this?
Sent from my SGH-I717 using Tapatalk 2
Click to expand...
Click to collapse
I have a very similar problem. Actually it started like you. First I installed cm10.1. Was working great except I had intermittent 3g and no hspa. I tried different modem without result on intermittent data but I least I had 3g. But all of a sudden I started getting no network at all. Not even voice. It seems my phone can no longer find any operator except for rogers. I tried aokp, goong back to cm10, no luck. Still no network..Ow i'm going back to stock and if it doesnt work well I dont know what elae to do. Hope someone here can help.

is your imei number still intact or has it changed?

Update
ebfortin said:
I have a very similar problem. Actually it started like you. First I installed cm10.1. Was working great except I had intermittent 3g and no hspa. I tried different modem without result on intermittent data but I least I had 3g. But all of a sudden I started getting no network at all. Not even voice. It seems my phone can no longer find any operator except for rogers. I tried aokp, goong back to cm10, no luck. Still no network..Ow i'm going back to stock and if it doesnt work well I dont know what elae to do. Hope someone here can help.
Click to expand...
Click to collapse
Update: ive looked in *#*#4636#*#* facility and discovered that I cant change the band to use. When I select the menu itwm I get no options. Whereas on my girlfriend phone there are options. Maybe it can help pinpoint the problem.

24680 said:
is your imei number still intact or has it changed?
Click to expand...
Click to collapse
+10 - Make sure you have an IMEI.

My problem is identical. If the imei is gone or changed what is the solution if any?
Sent from my SGH-I717 using Tapatalk 2

bhundt said:
My problem is identical. If the imei is gone or changed what is the solution if any?
Sent from my SGH-I717 using Tapatalk 2
Click to expand...
Click to collapse
The solution is to go here: http://forum.xda-developers.com/showthread.php?t=1801997&page=22
And fix it.

Tmobile S4 on AT&T cannot connect to LTE help!

Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
are you using stock ROM?

Rattles said:
are you using stock ROM?
Click to expand...
Click to collapse
Yes I am, I guess I should've mentioned that

Apparently my data stopped working now too. No data at all

qidrox said:
Apparently my data stopped working now too. No data at all
Click to expand...
Click to collapse
Ok so after changing some options around in network i have 4G back up and running. Its on WCDMA/GSM now.

Did you check the apn to make sure its correct for att?
Sent from my SGH-M919 using xda premium

qidrox said:
Hey everyone!
So I picked up a tmobile s4 to use on ATT since I read it was the most unlocked due to bands / bootlocker. I unlocked it via the method described on this site via the debug menu.
Popped in ATT sim, everything looked fine initially.
1. I'm only getting 4G in an LTE area. device hasn't picked up any LTE anywhere yet.
2. When I go under "Network Mode" and select "LTE/GSM/WCDMA (auto connect) the signal dies out and it always reverts back to GSM/WCDMA"
3. I've called ATT a few times and triple checked that I'm on an Android LTE data plan, so that's not an issue. ATT techs suggested it could be a device issue and maybe I should take it into their tech center.
4. Tried to set up ATT Visual Voicemail, that failed also.
So can it be a Sim issue? Maybe something on tmobiles side? Since device was never active on their network. A lemon S4?
I've run out of options
Any help would be appreciated.
TIA!
Click to expand...
Click to collapse
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2

Soldier 2.0 said:
Dial *#*#4636*#*# go under phone and scroll down and select the mode you want then reboot.
Sent from my SGH-M919 using Xparent Skyblue Tapatalk 2
Click to expand...
Click to collapse
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?

Yeaaaayuh!
qidrox said:
Tried doing that. It says " USSD Code running" then it stops and states "Unable to process request"... I dont think that was normal?
Click to expand...
Click to collapse
Figured it out!!! Did a google search and noticed my APN values were wayyy off. Changed them. BAM LTE!! :laugh::good:
Thanks to all that helped!

Share those setting to help others !!!!!!!!

nmccready said:
Share those setting to help others !!!!!!!!
Click to expand...
Click to collapse
Go to settings> more networks>mobile networks> access point network> and change your settings to look like these....
In the "APNs" window just hit the + button to creat a new APN
Sent from my SGH-M919 using XDA Premium 4 mobile app

Thank you!
I also found the setting from here:
https://www.youtube.com/watch?v=gMyD8zqk-Hg which led to here: http://forum.xda-developers.com/showthread.php?t=2336085 .
The main end game fix was that ATT had my IMIE # incorrectly set. Once they fixed that my LTE was a go!
:good: :laugh:

LTE/CDMA in ro.radio.networkmode screws up phone.

Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
UPDATE... looks like as long as i dont try to make a call the option to switch it back to auto is still there. One a call is attempted and fails the option to set to auto disappears.

fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.

hyelton said:
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.
Click to expand...
Click to collapse
I understand but after it's been on LTE for a while it doesn't give you the option to switch back.

fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
fastwanabe said:
I understand but after it's been on LTE for a while it doesn't give you the option to switch back.
Click to expand...
Click to collapse
Depending on what rom your using under mobile networks there is network selections with
LTE/WCDMA/GSM
GSM Only
WCDMA Only
and LTE only

hyelton said:
Depending on what rom your using under mobile networks there is network selections with
LTE/WCDMA/GSM
GSM Only
WCDMA Only
and LTE only
Click to expand...
Click to collapse
Right, thats what normally the options are however after about 5 min after selecting LTE/CDMA the only options that appear were.
LTE/CDMA
CDMA
thats it.

fastwanabe said:
Right, thats what normally the options are however after about 5 min after selecting LTE/CDMA the only options that appear were.
LTE/CDMA
CDMA
thats it.
Click to expand...
Click to collapse
How are you changing it? Changing it via Build.Prop? Then there is your problem, JUST change it using the setting under mobile networks..

hyelton said:
Most carriers Phone calls and Texts dont go through LTE...... If your setting it to LTE only thats why.
Click to expand...
Click to collapse
hyelton said:
How are you changing it? Changing it via Build.Prop? Then there is your problem, JUST change it using the setting under mobile networks..
Click to expand...
Click to collapse
I'm changing it under mobile networks.

Stop changing it to lte/cdma and you're phone will no longer mess up. Leave it on gsm/wcdma/lte auto. You're phone will switch when the appropriate network is available!!!
Sent from my LG-E980 using XDA Premium 4 mobile app

fastwanabe said:
Hi, guys I recently ran into an issue with the build prop modification in regards to network selection. If I enable the network selection as pointed out in one of the other threads and select LTE /CDMA my phone will lock on LTE however no phone calls can be made out or recieved. I had to reflash to 10k then reroot and then change the build prop to CA/TLS and finally hardreset via stock recovery. Anybody else have this issue?
Click to expand...
Click to collapse
Simple fix. Just select airplane mode for a few and then toggle it off and you'll see your network options come back once data roaming turns off and your carrier logo appears. I typically run lte/CDMA to get consistent lte speed bit when a callsade I have the same issue as you. But I just gave your the fix so your good
Sent from my LG-E980 using Tapatalk 2

Jammol said:
Stop changing it to lte/cdma and you're phone will no longer mess up. Leave it on gsm/wcdma/lte auto. You're phone will switch when the appropriate network is available!!!
Sent from my LG-E980 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Thanks a lot captain obvious, the point of the thread wasn't to "not switch it" dude, it's finding a work around and make everybody aware of what happens.

fastwanabe said:
Thanks a lot captain obvious, the point of the thread wasn't to "not switch it" dude, it's finding a work around and make everybody aware of what happens.
Click to expand...
Click to collapse
It would happen on any phone!!!!!

Enable bands

My friends has a g920p and wants to enable some bands so lte from telcel can work now he has only H+. Can that be done. I know that the s3 can with some magic. Thanks
Enviado desde mi SM-N920C mediante Tapatalk

Just put the phone on automatic in mobile network settings and set up two apns one for hspa and another for lte but make sure the lte apn has the bearer option set to lte the other just leave it how it is.

Didnt get it my friend.... here in mexico we use same apn for 3G or 4G LTE. We just need a sim v6.x and will get the lte bands.
Enviado desde mi SM-G920F mediante Tapatalk

george241312 said:
Just put the phone on automatic in mobile network settings and set up two apns one for hspa and another for lte but make sure the lte apn has the bearer option set to lte the other just leave it how it is.
Click to expand...
Click to collapse
Can you explain this a little more im using sprint on tmobile and only getting h+ also

bighleo114312 said:
My friends has a g920p and wants to enable some bands so lte from telcel can work now he has only H+. Can that be done. I know that the s3 can with some magic. Thanks
Enviado desde mi SM-N920C mediante Tapatalk
Click to expand...
Click to collapse
I know how to do this, but you would need to have the MSL number, if you don't then Google idoneapps, this guy sells an app that unlocks phone and extract that number.

So i need the msl number so how can i get it. Friends phone is already unlock.
Enviado desde mi SM-G920F mediante Tapatalk

MSL number is needed to edit data settings in sprint hidden menu. Install shortcut lite master and then search for PST, launch that application. Then look for ##Data#menu. You'll see there if your LTE is enabled or not. If it is not the only way to enable it is having MSL number.

Hidden Menu
there is no need for app for shortcut. Go to setting and go to Activate this device. Phone will load some info then look at top right for MORE. Click on it then click on PST. This will take to hidden menu,

To get LTE working all you have to do is create two separate APN's one with your regular APN settings and another that is identical APN settings but on the "Bearer" setting put it on LTE and you're good to go also make sure your phone is set to automatic and not gsm / umts
Sent from my SM-G920P using XDA Free mobile app

Also the phone will automatically switch to the apn that's needed. No need to keep switching apns
Sent from my SM-G920P using XDA Free mobile app

george241312 said:
Also the phone will automatically switch to the apn that's needed. No need to keep switching apns
Sent from my SM-G920P using XDA Free mobile app
Click to expand...
Click to collapse
what you stated here is correct. but have you tried it yourself?
I did, but there issue with send text messages. incoming sms works, outgoing - no.
there is no need to set to automatic. in service menu there is point where you can set preferred network type LTE_GSM_UMTS., but again, sms does not work.

fixmewireless said:
what you stated here is correct. but have you tried it yourself?
I did, but there issue with send text messages. incoming sms works, outgoing - no.
there is no need to set to automatic. in service menu there is point where you can set preferred network type LTE_GSM_UMTS., but again, sms does not work.
Click to expand...
Click to collapse
Works perfect for me I'm using T-Mobile it does not even switch to 3g when sending a msg idk why yours is not working I'm on oh1 stock no root maybe if you have root it can screw things up because different kernel?
Sent from my SM-G920P using XDA Free mobile app

george241312 said:
Works perfect for me I'm using T-Mobile it does not even switch to 3g when sending a msg idk why yours is not working I'm on oh1 stock no root maybe if you have root it can screw things up because different kernel?
Sent from my SM-G920P using XDA Free mobile app
Click to expand...
Click to collapse
no root. i`m on stock oh1. i`m on metro pcs.

fixmewireless said:
no root. i`m on stock oh1. i`m on metro pcs.
Click to expand...
Click to collapse
No clue maybe do ##72786# it will reset the phones modem settings and it will nag about activation again and relock the phone but I did it since I can unlock it myself again and never had an issue.
Weird thing is that my phone after unlock it wanted activation popup and then it actually went through and it went away with my T-Mobile sim.
Sent from my SM-G920P using XDA Free mobile app

sadfsadf
Ok found something out for some reason if you do not get LTE after setting it to Automatic switch to LTE/CDMA let it reboot and Reswitch it to Automatic reboot again then LTE+GSM_WCDMA should work.

Do you mean in service mode select cdma/lte then reboot and then go back to service mode n select gsm/wcdma/lte? Because ive been trying that fkr hkurs since reading your post lol. If this works your a beast . We need a gsm rom for this phone tho

george241312 said:
Ok found something out for some reason if you do not get LTE after setting it to Automatic switch to LTE/CDMA let it reboot and Reswitch it to Automatic reboot again then LTE+GSM_WCDMA should work.
Click to expand...
Click to collapse
George, do you have a legit way to get lte working on our device ? I haven't seen any proof from anyone claiming lte working on att or tmobile.

george241312 said:
Ok found something out for some reason if you do not get LTE after setting it to Automatic switch to LTE/CDMA let it reboot and Reswitch it to Automatic reboot again then LTE+GSM_WCDMA should work.
Click to expand...
Click to collapse
hmmm, been in the same boat with T-Mobile and a G920P, with only 3G being picked up but after switching it to automatic, it picked up LTE! Thanks for the poiter. However, have you been able to get MMS enabled or working as I seem to have issues with that and not sure why it isn't downloading the messages. Not sure if I need to give T-Mo a call and get something enabled or what. BTW, how did you manage to make that annoying activation screen go away as the moment I got it unlocked and popped in my sim card, it can't ever activate, but works fine though

any one succeeded in unlocking bands
Has anyone had any success enabling additional bands on a Sprint S6? Basically the bands it comes unlocked with are useless for Europe 4g and would love to unlock bands 3, 7, 20, 28, however 3 & 7 would be enough.

jeff83nz said:
Has anyone had any success enabling additional bands on a Sprint S6? Basically the bands it comes unlocked with are useless for Europe 4g and would love to unlock bands 3, 7, 20, 28, however 3 & 7 would be enough.
Click to expand...
Click to collapse
Same here. seems to me Samsung does not give us open source to edit Exynos settings. As I'm aware, our phones' hardware is capable to get those bands