Develop Bugs

[Q] Using a T999 (Tmo) as a I747(AT&T)

I currently have a Galaxy S3, running rooted stock ICS for Tmobile - and I would like to switch over to ATT and keep the same phone, just flash the ATT JB stock firmware onto it (or a custom ROM), and whatever other flashes may be needed to make it work, or something along those lines. Is this even possible?
The only reason I would think it could work is that they are both GSM phones so the tech should essentially be the same right? And since it's rooted, switching the SIM shouldn't be an issue either, as I have done so when I am travelling.
Or are there other major diffs between the 2 s3's that I am missing which make this an impossible.
I have a friend who is looking to buy a new S3 from ATT, and I would just as soon sell him mine with their stock stuff on there if they are basically the same.
Many thanks in advance to any who can help shed light on this.

U have complete wrong idea brother. You cant just flash att s 3 rom on tmobile s 3.
Find some att based rom for tmobile s3 . i think we have some.
Its almost same hardware but not same network antenna. So you cant run att 4g on it.
Simply dont flash att rom on it unless its says for tmobile.

bikrame said:
U have complete wrong idea brother. You cant just flash att s 3 rom on tmobile s 3.
Find some att based rom for tmobile s3 . i think we have some.
Its almost same hardware but not same network antenna. So you cant run att 4g on it.
Simply dont flash att rom on it unless its says for tmobile.
Click to expand...
Click to collapse
I always thought that Tmo (i was actually told this by tech support once) shares antennas/repeaters with ATT... so I guess they are just piping the 4G through a diff frequency or something, and the antenna isn't tuned to pick it up. damn.
are there any carriers it WILL work with?

mikewikkid said:
I always thought that Tmo (i was actually told this by tech support once) shares antennas/repeaters with ATT... so I guess they are just piping the 4G through a diff frequency or something, and the antenna isn't tuned to pick it up. damn.
are there any carriers it WILL work with?
Click to expand...
Click to collapse
The T999 supports at&t's 3G, just not their LTE (T999 doesn't support LTE period).
What was being told to you is don't flash an at&t baseband (radio), recovery, or full ROM to the phone or you risk a brick. Any of the ROMs marked *AROMA* have multi-carrier compatibility, you just choose the underlying device.

mikewikkid said:
I currently have a Galaxy S3, running rooted stock ICS for Tmobile - and I would like to switch over to ATT and keep the same phone, just flash the ATT JB stock firmware onto it (or a custom ROM), and whatever other flashes may be needed to make it work, or something along those lines. Is this even possible?
The only reason I would think it could work is that they are both GSM phones so the tech should essentially be the same right? And since it's rooted, switching the SIM shouldn't be an issue either, as I have done so when I am travelling.
Or are there other major diffs between the 2 s3's that I am missing which make this an impossible.
I have a friend who is looking to buy a new S3 from ATT, and I would just as soon sell him mine with their stock stuff on there if they are basically the same.
Many thanks in advance to any who can help shed light on this.
Click to expand...
Click to collapse
Sorry to say, but you are forgetting something, a stock rooted Tmobile Galaxy S3
is not compatible with the AT&T services as well as any of the AT&T roms.
You would need to UNLOCK the phone first before doing anything else.
Good Luck!

Thread belongs in Q&A, reported.
|When Emotion Goes Up, Logic Goes Down|
|Even If You Fall Face First You're Still Moving Forward|

Misterjunky said:
Sorry to say, but you are forgetting something, a stock rooted Tmobile Galaxy S3
is not compatible with the AT&T services as well as any of the AT&T roms.
You would need to UNLOCK the phone first before doing anything else.
Good Luck!
Click to expand...
Click to collapse
pardon my ignorance, but what is the diff between unlocking and rooting, and how can I go about doing it? Also, and this is an aside, the only way that i can find to change the IMEI of a T999 is by using an external box - there is no software-only method of doing this yet, correct?

re: unlocking
mikewikkid said:
pardon my ignorance, but what is the diff between unlocking and rooting, and how can I go about doing it? Also, and this is an aside, the only way that i can find to change the IMEI of a T999 is by using an external box - there is no software-only method of doing this yet, correct?
Click to expand...
Click to collapse
To put it into simple terms,
Rooting a phone allows YOU to make changes to the phone which includes flashing roms as well as
allowing apps which require root access to work on your phone which are available at the play store.
But rooting has nothing to do with AT&T or any other carriers.
Unlocking a phone allows the phone to communicate with different carriers like AT&T and others.
Your phone does not need to be rooted to work with different carriers, it only needs to be Unlocked.
Also once the phone is unlocked you would need a AT&T Sim card for it to work.
Even an Unlocked Galaxy S3 will not work on AT&T unless you have a AT&T sim card.
There is absolutely no reason to change IMEI.
If you want to find out more about Unlocking, here is a link: https://www.google.com/search?q=unl...96,d.cGE&fp=db8d96ed93be75f0&biw=1017&bih=490
Check out the videos and articles.
Good Luck with the phone.

mikewikkid said:
pardon my ignorance, but what is the diff between unlocking and rooting, and how can I go about doing it? Also, and this is an aside, the only way that i can find to change the IMEI of a T999 is by using an external box - there is no software-only method of doing this yet, correct?
Click to expand...
Click to collapse
This is what you need, a SIM Unlock - and it happens to be rather easy on the S3.
http://forum.xda-developers.com/showthread.php?t=2023709 :good:

they are right. you need to unlock your phone. if you go into a store or call customer care they should be able to help you out with unlocking it. i used to work for tmobile and i remember unlocking a few peoples phones.

[Q] Help with unlock

To state clearly at first. The new phone in question was not rooted when I purchased it, but I did root it. So the phone is rooted but not unlocked. I thought I should also add that I'm in Atlantic Canada.
As usual, I always seem to have an issue that I look and can never seem to find the answer. This leaves me asking a question that I'm hoping there isn't already an answer to because I know people hate that.
So here goes. I have 2 SGH-989D phones. One I got new 18 months to 24 months ago with my re-negotiated Telus contract. I got the second one "barely used" a couple of months ago and I'm pretty sure it was a Bell pay as you go phone as this is what the person told me. He said all of the phones they get are always Bell. He would have no reason to not be truthful especially since I had a Telus and he knew I would need to unlock it I purchased it because my existing phone was acting up and also the screen was pretty severely cracked.
What I found odd is that when I put the Telus SIM card in the phone, I didn't get any message that the phone was locked. I was immediately able to dial a number and the call went through. I could also send and receive txt's. The phone also says Telus at the bottom of the screen. What is problematic however is that 4g won't work. When go into the new phone under network mode info this appears "GSM/WCDMA(Auto Mode)" But when I look at my original phones network mode I get "GSM/HSPA(Auto Mode)" So, I'm thinking this is probably quite obviously the reason that 4g isn't working and I have no data available unless I connect to wifi. This won't do.
So, where do I go from here? I'm thinking i need to unlock the phone in order to do something about this probably? Or is there something else I can do to pick up the HSPA instead of WCDMA? I'm so irritated by this. It feels like it should be a simple fix since both of these phones are SGH-989d's but maybe it's not. Lastly, and I don't think this makes much of a difference. My old phone is 4.0.3 version and my newer one is 4.1.2.
Thanks and I'm hoping someone knows what or if I can do anything or if I should just give up. I really hate giving up so I'm hoping it's not the latter of the two options.

Moved to Q and A, and, please do not bump within the same 24 hour period.

Xmariner said:
To state clearly at first. The new phone in question was not rooted when I purchased it, but I did root it. So the phone is rooted but not unlocked. I thought I should also add that I'm in Atlantic Canada.
As usual, I always seem to have an issue that I look and can never seem to find the answer. This leaves me asking a question that I'm hoping there isn't already an answer to because I know people hate that.
So here goes. I have 2 SGH-989D phones. One I got new 18 months to 24 months ago with my re-negotiated Telus contract. I got the second one "barely used" a couple of months ago and I'm pretty sure it was a Bell pay as you go phone as this is what the person told me. He said all of the phones they get are always Bell. He would have no reason to not be truthful especially since I had a Telus and he knew I would need to unlock it I purchased it because my existing phone was acting up and also the screen was pretty severely cracked.
What I found odd is that when I put the Telus SIM card in the phone, I didn't get any message that the phone was locked. I was immediately able to dial a number and the call went through. I could also send and receive txt's. The phone also says Telus at the bottom of the screen. What is problematic however is that 4g won't work. When go into the new phone under network mode info this appears "GSM/WCDMA(Auto Mode)" But when I look at my original phones network mode I get "GSM/HSPA(Auto Mode)" So, I'm thinking this is probably quite obviously the reason that 4g isn't working and I have no data available unless I connect to wifi. This won't do.
So, where do I go from here? I'm thinking i need to unlock the phone in order to do something about this probably? Or is there something else I can do to pick up the HSPA instead of WCDMA? I'm so irritated by this. It feels like it should be a simple fix since both of these phones are SGH-989d's but maybe it's not. Lastly, and I don't think this makes much of a difference. My old phone is 4.0.3 version and my newer one is 4.1.2.
Thanks and I'm hoping someone knows what or if I can do anything or if I should just give up. I really hate giving up so I'm hoping it's not the latter of the two options.
Click to expand...
Click to collapse
The phone is unlocked or you wouldn't of been able to make calls etc with your sim.
My guess as to the problem is that your Bell phone is not a SGH-T989D, it's actually a SGH-i757M or GT-I9100M, they are called Samsung Galaxy S2's but there are a few models of the S2 out there. To verify your model either go to Settings > About phone and check Model number, or pull battery and look under it for the model number. To my knowledge, Bell has never sold the SGH-T989D model of the S2.

Almite said:
The phone is unlocked or you wouldn't of been able to make calls etc with your sim.
My guess as to the problem is that your Bell phone is not a SGH-T989D, it's actually a SGH-i757M or GT-I9100M, they are called Samsung Galaxy S2's but there are a few models of the S2 out there. To verify your model either go to Settings > About phone and check Model number, or pull battery and look under it for the model number. To my knowledge, Bell has never sold the SGH-T989D model of the S2.
Click to expand...
Click to collapse
Thanks for your reply Almite. Unfortunately the phone is the SGH-T989D.. I know it's a weird problem I've got here.
I used to play around with satellites back in the day. One of the things we used to do with the boxes was to jtag the box, erase the memory from the primary chip and then flash it with a different STB's info. This would enable us to do some wonderful things.
Rooting and then unlocking seems like a similar process however I just don't want to flash the phone with something that is going to brick it. I guess I'm going to need to do something. This phone is no good to me this way. If I brick it, I brick it. What I would like from someone in the community would be to direct me to the easiest process to flash my phone with a telus ROM.
I have read A LOT and there are many opinions out there, but I'm thinking that there is probably a consensus on what is the best and easiest way.

Update
I have successfully installed Jedi Mind Trick using TWRP as it appeared to be the best stable one out there. Used Darksides superwipe and then installed JMT. Still have issue of GSM/HSPA on original phone vs GSM/WCMDA on the phone that now has JMT installed on. I must say, I'm pretty impressed with how easily it installed and the ROM itself however sadly it did not help my conundrum.
I'm thinking that there is probably a developer here up for a challenge that could probably assist me with my problem. I really would like to be able to pick up 4g on this phone, or It's pretty much useless to me. What I need to figure out is how I can change this phone to recognize the HSPA network instead of the WCMDA network as GSM does not appear to be relative to data. Not with Telus anyway it would seem.
Maybe this isn't even possible because it's hard coded into the phone or something. Anyone have any ideas?

Last update unless anyone has any ideas
Xmariner said:
I have successfully installed Jedi Mind Trick using TWRP as it appeared to be the best stable one out there. Used Darksides superwipe and then installed JMT. Still have issue of GSM/HSPA on original phone vs GSM/WCMDA on the phone that now has JMT installed on. I must say, I'm pretty impressed with how easily it installed and the ROM itself however sadly it did not help my conundrum.
I'm thinking that there is probably a developer here up for a challenge that could probably assist me with my problem. I really would like to be able to pick up 4g on this phone, or It's pretty much useless to me. What I need to figure out is how I can change this phone to recognize the HSPA network instead of the WCMDA network as GSM does not appear to be relative to data. Not with Telus anyway it would seem.
Maybe this isn't even possible because it's hard coded into the phone or something. Anyone have any ideas?
Click to expand...
Click to collapse
Spent almost an hour on phone with Telus tech support. he explained that WCMDA should work fine as that and HSPA are essentially the same thing. Went through several settings changes and edits with him. In the end, he was stumped. The changes we made should have worked but did not. Therefore I supposed I have no choice but to give up. Guess I'll give the phone to my daughter as i don't want her to go online without wifi anyway.

Same issue
My wife recently cracked the screen on her Rugby Pro so I picked up a slightly used Koodo T989D and plugged in the SIM card. I had the same thing happen. Phone booted, made calls, all seemed well. The next day she realized she had no data connection. I rooted the phone, flashed Telus radio, tried different ROMs, even purchased the unlock code for it hoping for a fix. I can't seem to find anything that will allow this phone data connection of any type other than Wi-Fi. I would really appreciate any ideas or information that anyone has on this topic as I'm running out of ideas and buying another replacement isn't an option.
---------- Post added at 09:22 PM ---------- Previous post was at 08:32 PM ----------
Xmariner said:
To state clearly at first. The new phone in question was not rooted when I purchased it, but I did root it. So the phone is rooted but not unlocked. I thought I should also add that I'm in Atlantic Canada.
As usual, I always seem to have an issue that I look and can never seem to find the answer. This leaves me asking a question that I'm hoping there isn't already an answer to because I know people hate that.
So here goes. I have 2 SGH-989D phones. One I got new 18 months to 24 months ago with my re-negotiated Telus contract. I got the second one "barely used" a couple of months ago and I'm pretty sure it was a Bell pay as you go phone as this is what the person told me. He said all of the phones they get are always Bell. He would have no reason to not be truthful especially since I had a Telus and he knew I would need to unlock it I purchased it because my existing phone was acting up and also the screen was pretty severely cracked.
What I found odd is that when I put the Telus SIM card in the phone, I didn't get any message that the phone was locked. I was immediately able to dial a number and the call went through. I could also send and receive txt's. The phone also says Telus at the bottom of the screen. What is problematic however is that 4g won't work. When go into the new phone under network mode info this appears "GSM/WCDMA(Auto Mode)" But when I look at my original phones network mode I get "GSM/HSPA(Auto Mode)" So, I'm thinking this is probably quite obviously the reason that 4g isn't working and I have no data available unless I connect to wifi. This won't do.
So, where do I go from here? I'm thinking i need to unlock the phone in order to do something about this probably? Or is there something else I can do to pick up the HSPA instead of WCDMA? I'm so irritated by this. It feels like it should be a simple fix since both of these phones are SGH-989d's but maybe it's not. Lastly, and I don't think this makes much of a difference. My old phone is 4.0.3 version and my newer one is 4.1.2.
Thanks and I'm hoping someone knows what or if I can do anything or if I should just give up. I really hate giving up so I'm hoping it's not the latter of the two options.
Click to expand...
Click to collapse
So I hunted and finally answered this question we both had. Go to Settings:Wireless and Networks:Mobile Networks:Access Point Names.
Since my phone was a Koodo phone it lists Koodo SP. Click the menu button then New APN. Name it whatever you want. I called it Telus. APN is sp.telus.com. Scroll down to MMSC and type http: // aliasredirect. net/proxy/mmsc (without the spaces. They won't let me post a 'link'). Under MMSC proxy type 74.49.0.18. MMS port is 80. MCC is 302. MNC is 220. APN type should be Internet + mms. Click the menu button and save. Click the circle behind your newly created APN and wait. In under 30 seconds I had 4G connection.
Hope this helps you.

[Q] Sprint tech support sent me to Xda for this problem

No one has a clue why Sprint can't see serial number & can't activate it. It was Demo phone never activated for use.
ESN ready for activation!
SAMSUNG L900 SILVER (SPHL900GYS)
version 4.3
1. I tried some forenic software & I did see GSM in the settings. But under phone Device details it says CDMA-eHRPD.
2. If my 14yo kid playing around it unlock it with a bad code before it was activated have screwed it up and changed setting to GSM?
3. Would flashing &/or rooting return it to normal, if the problem is it was set/changed to GSM & not CDMA?
4. Could it be flashed to another mvo but since it hasn't been activated with Sprint first, would that make a difference?
I already spent a couple of weeks searching google, this & other forums & couldn't find a similar situation. Contacted everyone possible at Sprint support. Their solution was take it to a Sprint repair store, which is a 3 hour drive. Just to see if it was ever flashed which it wasn't. I guess I'll do the store if I can't get help here. I was hoping just some simple setting changes might fix it.
Can anyone please help with this problem or give options?

If your phone is in fact a Sprint branded phone then yes you can activate it on the Sprint network. I assume the esn and meid numbers are attached on the back of the phone beneath the battery. If so then all you will need to do is flash the stock Sprint rom on your phone using odin. I would first get your phone back to factory condition and verify everything works by visiting this thread...
http://forum.xda-developers.com/showthread.php?t=2591898
Follow the instructions to get your phone back to original out of box condition. Good luck.

[Q] SM-N900T, IMEI Cert Fail help

To make a long story short, I bought a T-Mobile unlocked Note 3 off of Swappa, and after three tries I finally got one that didn't have mismatching IMEI numbers, or one that got blacklisted like 5 days after I activated it. Anyway. This newest one was activated and fine until I got home and I did the OTA updates. Now it is saying that my "IMEI Cert: FAIL, -4" when I hit the *#0011# code; resulting in my loss of service. I have been looking all over the internet for a fix for this, and I can't find anything except for other people with this issue, and websites with poor English saying to pay them to fix it. Does anyone have any real info?

A quick Google suggests that using Odin to flash a stock ROM might fix it. I would do a full factory reset first as well. Get things back to base stock, as much as possible.
I seem to recall that some issues with EFS backup/restore in custom recoveries early on were fixed by wiping the EFS partition and rebooting. Apparently the modem firmware has a way to rebuild it on N3. For details, search the general forum and/or development forum. I don't recall details, just some talk about it working as a way to fix devices that got messed up. Don't even ask here about changing IMEI or other illegal options. They are not allowed on XDA, if they are even possible.
I can't believe you went through 3 bad phones. One would have been enough for me. I simply don't buy used phones online anymore. It's not worth the bother to me. I buy direct from TMO as I can make them fix it if they give me a bad one. Sucks, but since they can blacklist any time, and leave you hanging, I want to be sure I have a reputable place to go to get it replaced if that happens. I hope you get yours working again.

Drixnya said:
To make a long story short, I bought a T-Mobile unlocked Note 3 off of Swappa, and after three tries I finally got one that didn't have mismatching IMEI numbers, or one that got blacklisted like 5 days after I activated it. Anyway. This newest one was activated and fine until I got home and I did the OTA updates. Now it is saying that my "IMEI Cert: FAIL, -4" when I hit the *#0011# code; resulting in my loss of service. I have been looking all over the internet for a fix for this, and I can't find anything except for other people with this issue, and websites with poor English saying to pay them to fix it. Does anyone have any real info?
Click to expand...
Click to collapse
This may be a little bit late, but I just discovered that I could fix mine with the exact same issue by flashing a Jelly Bean modem for my model.
Under any firmware on KK or LP, it would Certi: Fail, as soon as I flashed a JB modem, it worked again and passed.

Does Flashing Stock Firmware Tar trip KNOX on the Note 4?

I'm having issues with my phone reverting to 3G after only being on LTE for a minute no matter how good of a signal of LTE I have. This just started today, and I have refreshed the profile, prl. I had the Sprint people remotely update my phone, and they also checked for issues in my area and there are none. I also factory reset/data wiped my phone and it didn't help either.
So before I call Samsung and tell them my issues for a replacement I wanted to try installing the Factory TAR via Odin to see if that might fix it since I guess factory reset may not really touch any corrupt modem/radio files really.
I know that on the Note 3 it didn't trip it, but I was wondering if someone has had the chance to do this yet on ours to see if it tripped it?
I might call Best Buy and tell them my problem and see if they will switch it out for me even though I am out of the 14 day return window. I really don't want to send it back to Samsung and wait a week or more for a new phone.

slickdaddy96 said:
I'm having issues with my phone reverting to 3G after only being on LTE for a minute no matter how good of a signal of LTE I have. This just started today, and I have refreshed the profile, prl. I had the Sprint people remotely update my phone, and they also checked for issues in my area and there are none. I also factory reset/data wiped my phone and it didn't help either.
So before I call Samsung and tell them my issues for a replacement I wanted to try installing the Factory TAR via Odin to see if that might fix it since I guess factory reset may not really touch any corrupt modem/radio files really.
I know that on the Note 3 it didn't trip it, but I was wondering if someone has had the chance to do this yet on ours to see if it tripped it?
I might call Best Buy and tell them my problem and see if they will switch it out for me even though I am out of the 14 day return window. I really don't want to send it back to Samsung and wait a week or more for a new phone.
Click to expand...
Click to collapse
I don't see why it should you are not flashing a custom Rom just the original firmware stock. Your KNOX is in tact now your not rooted your good to go:good:

don't quote me, but I think Knox is tripped when change to a custom recovery, which is what is needed to install a custom rom.
Unless you're rooted, you should be fine. If you are, you've probably already tripped it.

flashing stock tar
Did that fix your LTE issues? Im having the same issue.

slickdaddy96 said:
I'm having issues with my phone reverting to 3G after only being on LTE for a minute no matter how good of a signal of LTE I have. This just started today, and I have refreshed the profile, prl. I had the Sprint people remotely update my phone, and they also checked for issues in my area and there are none. I also factory reset/data wiped my phone and it didn't help either.
So before I call Samsung and tell them my issues for a replacement I wanted to try installing the Factory TAR via Odin to see if that might fix it since I guess factory reset may not really touch any corrupt modem/radio files really.
I know that on the Note 3 it didn't trip it, but I was wondering if someone has had the chance to do this yet on ours to see if it tripped it?
I might call Best Buy and tell them my problem and see if they will switch it out for me even though I am out of the 14 day return window. I really don't want to send it back to Samsung and wait a week or more for a new phone.
Click to expand...
Click to collapse
Nothing you can do will fix the LTE issue. Sprint says it is a Samsung issue with the phones radio firmware and Samsung says it is an issue with the their towers not connecting to the phone properly. I am on my second note 4 with the same issue after Sprint swapped with me. On second phone I went around with them for a week. Finally got to talk to an advanced tech supervisor and he said according to some log only he and others at his level has access to Samsung has said that some Note 4 phones had been flashed improperly. Note by flashing I mean the use of JTAG equipment not some OTA or USB thing we can do. So Sprint advised me to contact Samsung about sending the phone in to be reflashed.
So begins my third week playing phone tag and on hold for 30+ minutes at a time. Finally Samsung admits there maybe an issue with the phone since it happens all over the DFW metroplex. So they tell me to send it in. I ask what the turn around is since it is my only phone and I can't be without it for 2+ weeks. So the Samsung says "I see you are in the Dallas area, just a moment" puts me on hold for another ten minutes. Comes back saying I will email you a service ticket you can print out and then carry it to our service center in east Plano.
So I did that, had to leave the phone with them for 2.5 hours. Went back and they said there is nothing wrong with the phone and that it was reflashed per Samsungs support request. Tested on my way home and got 30's near the repair facility, then down to 10's and singles. About half way to Carrollton back in to the 30's, then back to the singles or lower near my apartment. Just a 1/4 mile north of my apartment I can get 50's.
So neither is willing to offer a solution or even a cause and we are stuck between them. Tomorrow I am going to the Samsung store in Frisco and asking if they can do a swap for an S5 or something. Something to prove that at least Samsung still believes the customer is always right and to keep the customer happy. I am not going to hold my breath though.
Basically one of them dropped the ball on the version of the note 4 and neither wants to take the blame or the backfire that will come from it once made public.
In my case it looks like I am stuck with 20 more payments on a defective phone unless the Samsung store is willing to do something.