Develop Bugs

Returning SG3 to stock settings

Hi,
I recently purchased a Sprint SG3 on craigslist, but was unable to activate it through Sprint. They told me that the serial number in the phone was different from the serial number behind the battery which meant the phone was probably flashed to another carrier.
I have never rooted my android phones before, therefore am at a lost. The sales rep told actually told me about this website. So my question is, how do I go about restoring the phone to factory settings.. like if it was just out the box. Please help! >.<

Run this.(I'd go with the wipes data version).When it boots up it will attempt activation. If it still isn't working, open the dialer and hit ##72786#. Best of luck

billard412 said:
Run this.(I'd go with the wipes data version).When it boots up it will attempt activation. If it still isn't working, open the dialer and hit ##72786#. Best of luck
Click to expand...
Click to collapse
Does the phone have to be rooted to do this?

xraawrr said:
Does the phone have to be rooted to do this?
Click to expand...
Click to collapse
Nope, it roots it and reverts to stock at the same time

xraawrr said:
Hi,
I recently purchased a Sprint SG3 on craigslist, but was unable to activate it through Sprint. They told me that the serial number in the phone was different from the serial number behind the battery which meant the phone was probably flashed to another carrier.
I have never rooted my android phones before, therefore am at a lost. The sales rep told actually told me about this website. So my question is, how do I go about restoring the phone to factory settings.. like if it was just out the box. Please help! >.<
Click to expand...
Click to collapse
None of what has been posted is going to help you. All the "reset" advice will not change the serial (MEID/ESN) back to what it originally was (behind the battery/back of phone).
What happened is whoever had the phone previous to you "wrote" a different serial (MEID) using software, either for the purpose of using it on a different carrier or what-have-you.
Since you're obviously new to this, the fix is to find someone who "knows" about these things to write the correct serial back to the phone (frowned upon here on XDA) because they have to physically connect the phone to a computer and use software to do this. Or you can just take the loss and sell the phone back on Craigslist and list is as a BAD ESN.
If you were local to NYC, i could help you out, but alas...

[Q] Changing Baseband/Modem/Radio to i317 ATT from T889? Is it Possible?

Hi all -
Yes I am new here, but I have used this site for quite some time and haven't really been able to figure out the answer so here goes. I have a T-Mobile T889 Note 2 but I have ATT service. While I get service here at my house with the MB4 baseband, as soon as I leave and go anywhere, I lose signal where I would have it if I had an ATT version of this phone. In short, my actual signal stinks. My phone is unlocked, rooted, and I have run many different roms and tried modem zip files to no avail, only getting boot loops. I have tried the *#197328640# as well.
My question is: Is it possible to turn this T889 into a i317 ATT version so I can get better signal? Or am I just up a creek? There has to be a way to get a ATT modem to actually work.
Please, any help would be great, and thanks so much for all the input all of you have.

Update!
pmt223 said:
Hi all -
Yes I am new here, but I have used this site for quite some time and haven't really been able to figure out the answer so here goes. I have a T-Mobile T889 Note 2 but I have ATT service. While I get service here at my house with the MB4 baseband, as soon as I leave and go anywhere, I lose signal where I would have it if I had an ATT version of this phone. In short, my actual signal stinks. My phone is unlocked, rooted, and I have run many different roms and tried modem zip files to no avail, only getting boot loops. I have tried the *#197328640# as well.
My question is: Is it possible to turn this T889 into a i317 ATT version so I can get better signal? Or am I just up a creek? There has to be a way to get a ATT modem to actually work.
Please, any help would be great, and thanks so much for all the input all of you have.
Click to expand...
Click to collapse
Hope this helps anyone with issues on their phone...Contacted Samsung Support about my terrible radio/signal issues (going through T-Mobile was ridiculous, as I could not find the receipt, but the phone is still within its warranty period anyway). Samsung sent me a UPS label to ship the phone back. Flashed the phone back to stock and rolled the counter back to 0 using the tuts on here. Took about a week or so, but looks like they replaced two components on the phone after finding the following: NO PCS SERVICE - WILL NOT CHARGE - SIM ELECTRICAL FAILURE. Two components were replaced (not detailed as to what though). Samsung is sending the phone back to me now, no cost to me and no need for receipt either (since the phone hasnt even been on the market for a year, so it is def within warranty). So while many of us might find some issue with our phone and we continuously looks for different ways of tweaking or whatever, sometimes it's actual issues with the hardware that may need replacing.
Thanks all!

AT&T blocked network access

I purchased my Samsung S3 from a local pawn shop, I have the receipt and all. I got it home, I use net10 service, popped n my sims card, which I have done many times, the phone worked fine for little bit then I started getting an ATT error message saying "this device has been blocked from network access" I contacted Net10 they changed settings on their end it would work for few minutes then go right back to the error. I have called at&t, cant get thru to the actual customer service (it seems if you dont have an att phone number you cannot get to technical support) had to call the store of course they gave me stock answer, nothing they can do.
Is there anything I can do? would rooting it fix this or is there a program? Unlocking it? help I am desperate, already sold my other phone to buy this one!
SCREWED & IRRITATED:crying:

I would say try unlocking it. at this point it won't hurt.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

What version of android is the phone currently on? There are guides here on xda that will allow u to unlock right from the phone if you're on stock 4.1.1. I bought my s3 in May and use straight talk (at&t) and never had issues...

[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.

Sprint Galaxy S6 (G920p)

So I have contacted spring 20 times, they have confirmed my SM-G920p is domestically unlocked. Getting a sim from AT&T and it says invalid Sim. I've searched everywhere, some forums say do a paid service (im fine with) others say unlocking from sprint works....which is obviously doest for my phone.
Anyone actually sucsefully unlocked a spring galaxy s6 (g920p.20) and used it on AT&T network? If so can you give me the details?
Thanks!

Question. Why on this phone in the network mode does it have options to use CDMA, LTE/CDMA, GSM, GSM/UMTS?

GSM AT&T works fine Idk why ppl say it doesn't work I have H2O which uses AT&T and I get LTE. Use a website called willmyphonework to find answers on stuff like this

This is the first website I've created to post about this topic. I've spent the past few days researching and testing out things. So far I've only found a few post online saying it works....I've not heard much about the sm-G920P NOT working on other networks. Also the phone itself is not made for CDMA or GSM ONLY.
One thing is for sure, one of my sm-G920p is domestically unlocked from Sprint. They also gave me a MLS or MSL# or whatever even though I dont think it matters. This phone will not take any AT&T sims. It says invalid sim.
With another sm-G920p, I rooted it and unlocked it another way...obviously not involving sprint. I will test it this evening to see if it accepts AT&T's sim card and will post my findings.
The whole reason for this is we have a business that goes though phones due to physical damage. I have a couple left over phones that I've replaced the screen on myself. I would like to let my sister and fiance use the galaxy S6s as they have old phones! All of these phones have been paid in full FYI and our account is in great standing.

Okidoki. I have spent some time working on unlocking a Spring Galaxy S6 SM-G920P with stock firmware ending in QB1. At first I found out that US carriers now have to unlock your phone if you ask. At first I went that route as it seemed legit. I called Spring and got a guy on the phone from tech support. I gave him the DEC# on the back of the phone and he said "Great thanks.....its unlocked." I though sick!...went to AT&T next day and got a nano sim activated. Once entered the phone read "Invalid Sim". I got back on the phone with sprint quit quickly while at AT&T. The lady said she had to send in a ticket to get it unlocked and the guy before definitely did not unlock it. Went home and went online again. Next day the lady called me at 11am and said it was domestically unlocked. I called back an hour later and talked to someone else confirming it was unlocked. Went to sprint, installed new activated sim...."Invalid Sim". Next thing was to root it and try unlocking it myself.
I found out how to root the phone and install custom firmware and whatnot. Its fairly easy, similar to computer basics. Once that was done I unlocked the phone with a little help which was not hard to find. I went to AT&T and BOOM!!! Phone worked RIGHT away. I was blown away. The phone had voice, data, msg, voice mail 3g and lte. Had my fiance put in her google info.....FYI this is my fiances AT&T account and a spare S6 I had that i fixed the screen on. Anyway she put her google account into it and restarted the phone. At the "samsung" logo login little red letters at the top say something about FRP is locked. The way you bypass this is right after you unlock the phone you need to go into the developer options and enable OEM Unlock. This fixes the lockout. But to get back into the phone once you lock it out you have to re root the phone with its original firmware.
It has worked all evening. Thanks Jhoward you gave me that last little boost today to get it working. I know the SM-G920P phone works in every network so I have no idea why people think it can only work on one network. Something I did learn is that these are little computers.....pretty cool!
If anyone needs any more info pm me.
http://i.imgur.com/ch8TUWg.png
http://i.imgur.com/ijY1sed.png

They lie. It took me 5 calls and many hours to get one of my 2 s6 unlocked. There is some problem with original activation date on some of the phones.
They said both were unlocked but only one worked.... Until finally tech support fixed the activation date.
Now both work on T-Mobile very well

sprint is a little ***** when it comes to unlocking devices. i have never successfully unlocked a device from them. they will run circles of confusion around you just so you won't unlock.

G920P to GSM
localphit said:
Okidoki. I have spent some time working on unlocking a Spring Galaxy S6 SM-G920P with stock firmware ending in QB1. At first I found out that US carriers now have to unlock your phone if you ask. At first I went that route as it seemed legit. I called Spring and got a guy on the phone from tech support. I gave him the DEC# on the back of the phone and he said "Great thanks.....its unlocked." I though sick!...went to AT&T next day and got a nano sim activated. Once entered the phone read "Invalid Sim". I got back on the phone with sprint quit quickly while at AT&T. The lady said she had to send in a ticket to get it unlocked and the guy before definitely did not unlock it. Went home and went online again. Next day the lady called me at 11am and said it was domestically unlocked. I called back an hour later and talked to someone else confirming it was unlocked. Went to sprint, installed new activated sim...."Invalid Sim". Next thing was to root it and try unlocking it myself.
I found out how to root the phone and install custom firmware and whatnot. Its fairly easy, similar to computer basics. Once that was done I unlocked the phone with a little help which was not hard to find. I went to AT&T and BOOM!!! Phone worked RIGHT away. I was blown away. The phone had voice, data, msg, voice mail 3g and lte. Had my fiance put in her google info.....FYI this is my fiances AT&T account and a spare S6 I had that i fixed the screen on. Anyway she put her google account into it and restarted the phone. At the "samsung" logo login little red letters at the top say something about FRP is locked. The way you bypass this is right after you unlock the phone you need to go into the developer options and enable OEM Unlock. This fixes the lockout. But to get back into the phone once you lock it out you have to re root the phone with its original firmware.
It has worked all evening. Thanks Jhoward you gave me that last little boost today to get it working. I know the SM-G920P phone works in every network so I have no idea why people think it can only work on one network. Something I did learn is that these are little computers.....pretty cool!
If anyone needs any more info pm me.
http://i.imgur.com/ch8TUWg.png
http://i.imgur.com/ijY1sed.png
Click to expand...
Click to collapse
Hello localphit, can you help me do the same with my Galaxy S6 G920P. Mines in currently on android 7.0 Patch January 1, 2018. Appreciate all the help that you can give.