hey everyone, i'm about to buy AT&T Galaxy Note through Craigslist.
seller states that it is unlocked, but not rooted. is there anyway for me to verify it is unlocked?
is it simply inserting my T-Mobile SIM card and making sure it doesn't say phone is locked, enter network lock control key, etc...?
tuffCookie said:
hey everyone, i'm about to buy AT&T Galaxy Note through Craigslist.
seller states that it is unlocked, but not rooted. is there anyway for me to verify it is unlocked?
is it simply inserting my T-Mobile SIM card and making sure it doesn't say phone is locked, enter PIN, etc...?
Click to expand...
Click to collapse
Yes all you have to do is insert your sim and it will either connect, or you will get a prompt to enter the PIN. If you want to use 3G/4Gish though, you will have to root and flash the t-mo radio that's in dev section.
P.S. With most Samsung phones, you can check for the unlock by dialing *#7465625# and it will tell you directly if there's a network lock on it, but Samsung disabled this on the skyrocket IIRC and kept it disabled on the note
zoso28 said:
Yes all you have to do is insert your sim and it will either connect, or you will get a prompt to enter the PIN. If you want to use 3G/4Gish though, you will have to root and flash the t-mo radio that's in dev section.
P.S. With most Samsung phones, you can check for the unlock by dialing *#7465625# and it will tell you directly if there's a network lock on it, but Samsung disabled this on the skyrocket IIRC and kept it disabled on the note
Click to expand...
Click to collapse
perfect. thanks for the quick response!
When I inserted a tmo sim into mine nothing happened except for it would show the sim phone number under the Settings app. No signal bars either. This is on a stock unlocked phone.
CreekDirt said:
When I inserted a tmo sim into mine nothing happened except for it would show the sim phone number under the Settings app. No signal bars either. This is on a stock unlocked phone.
Click to expand...
Click to collapse
You might have to wait a few minutes for it to acquire the signal.. Is the sim active? Sometimes inactive Sims don't connect, but I put my old t-mo sim in & it had a signal in 20-30 seconds.
Easiest way to tell is to reboot the phone after you put a non-at$t sim in. If it's locked it will ask for network control key .
Sent from my SAMSUNG-SGH-I727 using xda premium
zoso28 said:
You might have to wait a few minutes for it to acquire the signal.. Is the sim active? Sometimes inactive Sims don't connect, but I put my old t-mo sim in & it had a signal in 20-30 seconds.
Click to expand...
Click to collapse
Yeah it was an active sim. Ten minutes later with no results. It wouldn't work without the APN at all and the Tmo rep didn't want to go through all of that (it was his sim).
tuffCookie said:
hey everyone, i'm about to buy AT&T Galaxy Note through Craigslist.
seller states that it is unlocked, but not rooted. is there anyway for me to verify it is unlocked?
is it simply inserting my T-Mobile SIM card and making sure it doesn't say phone is locked, enter network lock control key, etc...?
Click to expand...
Click to collapse
It is that "simple"..
If you insert your non-AT&T (including it's MVNOs which are considered AT&T also), and it's LOCKED, it will ask you for the unlock code. If it doesn't, it has been unlocked permanently.
If after doing this, it does show your number under about, but you don't get a signal. This might be an indication of how well the phone gets a signal or how good/bad the signal is, on your carrier in the area you are testing in.
An after thought is to check the versions in the about and research. You may have acquired a hacker/tinkerer's phone that may have played further with the phone's settings and or flashed a different modem. It may also be indicative of why s/he is selling it, possibly faulty.. YMMV
You have to flash T-Mo compatible modem http://forum.xda-developers.com/showthread.php?t=1573568
thanks everyone. i bought a note from someone an hour after my initial post and it was unlocked.
i'm enjoying this phone/tablet/phablet/whatever u wanna call it on tmobile. still getting used to the size, but the display is beautiful.
Hello Everyone.
I am stumped on this issue. There doesn't seem to be any solutions for me. Here is What's happening, then I will tell you what I know..
Originally an ATT watch. SM-R750A
The IMEI is perfect. Not black listed at all. (Verified with ATT,SAMSUNG, and TMOBILE)
It is unlocked by ATT - I received the code and used it with the Tmobile Sim card inside when prompted. Success.
ATT Sim cards work perfectly,and with 4G!! When my Tmobile Sim goes in there, it only allows Emergency calls.
The APN settings are automatically populated. Verified to be correct with Tmobile. Basically, everything is fine on their end..
I am getting the run around from all 3 sources. They point the finger at each other.
Example:
Tmobile :"ATT did not unlock it completely, call them and ask for it to be fully unlocked."
ATT: "Once we gave you the code, our hands are tied. Call samsung, they may be able to complete your request.."
Samsung: "This is a service/network issue. Contact who ever your sim card has service with.."
Please help me, I have tried everything I can think of.
I researched all over the internet.. There are no working solutions anywhere!!!
I even Oden flashed the Official Firmware from ATT to Tmobile, so now my Model # is SM-R750T. I get the same errors. Att sim cards still work perfectly.
:crying:
I added photos of a menu I found on the device.. I dont know what this means..
I can draw conclusions, but I still need help..
Also, I have had the Tmobile Sim card replaced twice..
If someone could help find a solution, this will help a LOT people!
Thank You AHEAD of time.
did you flash the entire firmware package?
I only flashed official firmware from ATT to TMOBILE.. That was all. If there are further steps please let me know.
I stopped at the firmware install because I thought anything extra would have just been for customizing themes, etc..
animegamemaster said:
Hello Everyone.
I am stumped on this issue. There doesn't seem to be any solutions for me. Here is What's happening, then I will tell you what I know..
Originally an ATT watch. SM-R750A
The IMEI is perfect. Not black listed at all. (Verified with ATT,SAMSUNG, and TMOBILE)
It is unlocked by ATT - I received the code and used it with the Tmobile Sim card inside when prompted. Success.
ATT Sim cards work perfectly,and with 4G!! When my Tmobile Sim goes in there, it only allows Emergency calls.
The APN settings are automatically populated. Verified to be correct with Tmobile. Basically, everything is fine on their end..
I am getting the run around from all 3 sources. They point the finger at each other.
Example:
Tmobile :"ATT did not unlock it completely, call them and ask for it to be fully unlocked."
ATT: "Once we gave you the code, our hands are tied. Call samsung, they may be able to complete your request.."
Samsung: "This is a service/network issue. Contact who ever your sim card has service with.."
Please help me, I have tried everything I can think of.
I researched all over the internet.. There are no working solutions anywhere!!!
I even Oden flashed the Official Firmware from ATT to Tmobile, so now my Model # is SM-R750T. I get the same errors. Att sim cards still work perfectly.
:crying:
I added photos of a menu I found on the device.. I dont know what this means..
I can draw conclusions, but I still need help..
Also, I have had the Tmobile Sim card replaced twice..
If someone could help find a solution, this will help a LOT people!
Thank You AHEAD of time.
Click to expand...
Click to collapse
Tmobile :"ATT did not unlock it completely, call them and ask for it to be fully unlocked."
From my understanding, there are no levels of unlock permissions. Once a device is unlocked, it's done on all levels and access.
It is unlocked by ATT - I received the code and used it with the Tmobile Sim card inside when prompted. Success.
The unlock code needs to be entered on device while connected to the ATT network...not TM's. My initial suggestion is kindly call back ATT and with the correct IMEI/ATT Sim inserted, enter unlock code again. You may need to flash back to xxxA first.
My thought here is the phone isn't unlocked according to ATT's server's Device ID data...when you reestablished connection with ATT, it locked the device again.
[Q]
You said that you got the unlock code from ATT, with TM Sim inserted, and it was a success....
Why did you go back to the ATT Sim again if you had it working?
animegamemaster said:
Hello Everyone.
I am stumped on this issue. There doesn't seem to be any solutions for me. Here is What's happening, then I will tell you what I know..
Originally an ATT watch. SM-R750A
The IMEI is perfect. Not black listed at all. (Verified with ATT,SAMSUNG, and TMOBILE)
It is unlocked by ATT - I received the code and used it with the Tmobile Sim card inside when prompted. Success.
ATT Sim cards work perfectly,and with 4G!! When my Tmobile Sim goes in there, it only allows Emergency calls.
The APN settings are automatically populated. Verified to be correct with Tmobile. Basically, everything is fine on their end..
I am getting the run around from all 3 sources. They point the finger at each other.
Example:
Tmobile :"ATT did not unlock it completely, call them and ask for it to be fully unlocked."
ATT: "Once we gave you the code, our hands are tied. Call samsung, they may be able to complete your request.."
Samsung: "This is a service/network issue. Contact who ever your sim card has service with.."
Please help me, I have tried everything I can think of.
I researched all over the internet.. There are no working solutions anywhere!!!
I even Oden flashed the Official Firmware from ATT to Tmobile, so now my Model # is SM-R750T. I get the same errors. Att sim cards still work perfectly.
:crying:
I added photos of a menu I found on the device.. I dont know what this means..
I can draw conclusions, but I still need help..
Also, I have had the Tmobile Sim card replaced twice..
If someone could help find a solution, this will help a LOT people!
Thank You AHEAD of time.
Click to expand...
Click to collapse
Try this. Go to phone dialer, type in *#2263# , dont hit call , just wait for the menu. When it comes up, select GSM band preference and if its an option, choose GSM 1800. Then swipe down to exit.
Sent from my SAMSUNG-SM-N910A using XDA Free mobile app
mghtymse007 said:
Tmobile :"ATT did not unlock it completely, call them and ask for it to be fully unlocked."
From my understanding, there are no levels of unlock permissions. Once a device is unlocked, it's done on all levels and access.
It is unlocked by ATT - I received the code and used it with the Tmobile Sim card inside when prompted. Success.
The unlock code needs to be entered on device while connected to the ATT network...not TM's. My initial suggestion is kindly call back ATT and with the correct IMEI/ATT Sim inserted, enter unlock code again. You may need to flash back to xxxA first.
My thought here is the phone isn't unlocked according to ATT's server's Device ID data...when you reestablished connection with ATT, it locked the device again.
[Q]
You said that you got the unlock code from ATT, with TM Sim inserted, and it was a success....
Why did you go back to the ATT Sim again if you had it working?
Click to expand...
Click to collapse
The unlock code worked. I was not prompted to enter another unlock code. I received success notification. I immediately got the error code that you see in the pictures. Could not dial out. So i went to ATT store for some hands on troubleshooting. But I will try to use the sim card idea you mentioned. I will come back with an update.
vacortina said:
Try this. Go to phone dialer, type in *#2263# , dont hit call , just wait for the menu. When it comes up, select GSM band preference and if its an option, choose GSM 1800. Then swipe down to exit.
Sent from my SAMSUNG-SM-N910A using XDA Free mobile app
Click to expand...
Click to collapse
This is a 'no-go' as well.. I will flash my firmware back to ATT and try it again.
Edit:
No, this did not work as well..
animegamemaster said:
The unlock code worked. I was not prompted to enter another unlock code. I received success notification. I immediately got the error code that you see in the pictures. Could not dial out. So i went to ATT store for some hands on troubleshooting. But I will try to use the sim card idea you mentioned. I will come back with an update.
Click to expand...
Click to collapse
The same here. I'm from Vietnam. My boss from USA visited Vietnam office and gifted me a T-mobile Gear S with the unlock code from T-mobile. Before unlocking the network, i upgrade it with the latest firmware from T-mobile (R750TUVU1A07). I then inserted a VN carrier SIM and did follow T-mobile guide as below:
1.Insert a Non-T-Mobile SIM & turn the Gear S ON.
2.The Gear S will automatically prompt you to enter the unlock code.
3.Tap in the unlock code provided by T-Mobile and click OK.
Note: The device should display code accepted
Click to expand...
Click to collapse
After i receive the successful message, i still cant make call or send message. It keep saying that "Mobile network is not available". I tried with 3 nano sim cards from 3 biggest carriers in VN but there is no luck. (These sim cards work well on the iPhone 5).
BTW, the GPS also didn't work, even before or after unlocking with the code. It keep saying "GPS signal too weak. Please connect the Gear to mobile device via Bluetooth" (or something like that).
snowinjune said:
The same here. I'm from Vietnam. My boss from USA visited Vietnam office and gifted me a T-mobile Gear S with the unlock code from T-mobile. Before unlocking the network, i upgrade it with the latest firmware from T-mobile (R750TUVU1A07). I then inserted a VN carrier SIM and did follow T-mobile guide as below:
After i receive the successful message, i still cant make call or send message. It keep saying that "Mobile network is not available". I tried with 3 nano sim cards from 3 biggest carriers in VN but there is no luck. (These sim cards work well on the iPhone 5).
BTW, the GPS also didn't work, even before or after unlocking with the code. It keep saying "GPS signal too weak. Please connect the Gear to mobile device via Bluetooth" (or something like that).
Click to expand...
Click to collapse
You most likely will not be able to use a North American S outside the US. It has nothing to do with the software...the frequency bands are different and hardcoded. You may want to check and see what bands are used by the providers in VN for cellular ie: 2G, 3G, etc and compare those to what US/Sprint uses.
I have the same issues with the GPS. Even when I'm outside, in an open area I can't even get the weather app to update. Not sure how many people have this issue, but it doesn't seem to be a topic of discussion on XDA.
snowinjune said:
The same here. I'm from Vietnam. My boss from USA visited Vietnam office and gifted me a T-mobile Gear S with the unlock code from T-mobile. Before unlocking the network, i upgrade it with the latest firmware from T-mobile (R750TUVU1A07). I then inserted a VN carrier SIM and did follow T-mobile guide as below:
After i receive the successful message, i still cant make call or send message. It keep saying that "Mobile network is not available". I tried with 3 nano sim cards from 3 biggest carriers in VN but there is no luck. (These sim cards work well on the iPhone 5).
BTW, the GPS also didn't work, even before or after unlocking with the code. It keep saying "GPS signal too weak. Please connect the Gear to mobile device via Bluetooth" (or something like that).
Click to expand...
Click to collapse
---------- Post added at 02:15 PM ---------- Previous post was at 02:12 PM ----------
animegamemaster said:
This is a 'no-go' as well.. I will flash my firmware back to ATT and try it again.
Edit:
No, this did not work as well..
Click to expand...
Click to collapse
Have you tried rooting?
http://forum.xda-developers.com/showthread.php?t=2977581
Thanks to cipherswitch
This is from "CELLUNLOCKER" where I got my unlock code...before it was free...lol....... When I click on the t mobile for network....I get "registered to networkk" popup with my ATT GS. When I call a number I get the tmobile cust servc help line...... since I am not a tmobile cust.
I cannot remember which method I used....but I can go with att or tmobile sims with no issues. Right now I have H20 as my carrier, on the ATT network...but at least I know I can go to the Tmobile network or carriers anytime
How to enter unlock codes on all Samsung models
Different phones have different Unlock Code Input Instructions, Try the following Instructions in order:
Note: Non Accepted Simcard is any simcard not from the original provider
Method #1 Insert a Non accepted simcard in your phone and power on. Once finished loading your phone will ask you to enter a code, enter the Unlock Code
OR
Method #2 (NOT applicable for newer Samsung phones, ie. Galaxy S3, S4, S5, Note 2, Note 3, etc)
Go to the dial screen on your phone as if you are going to make a call and press: #7465625*638*UNLOCKCODE# (8 digit unlock code)
OR
Method #3 (NOT applicable for newer Samsung phones, ie. Galaxy S3, S4, S5, Note 2, Note 3, etc)
Go to the dial screen on your phone as if you are going to make a call and press: #0111*UNLOCKCODE# (8 digit unlock code)
OR
Method #4 (NOT applicable for newer Samsung phones, ie. Galaxy S3, S4, S5, Note 2, Note 3, etc)
Go to the dial screen on your phone as if you are going to make a call and press #7465625*638*# Once prompted for code, enter the 8 digit Unlock Code.
When this method is used for newer Samsung phones, it will say "unsuccessful" regardless of the phone being unlocked or not.
Phone Not Allowed MM#6 Tmobile- A clue to problem?
I also have the same problem...it is frustrating.
i have an unlocked AT&T Gear S ( unlocked thru one of the unlock ebay sites. it seemed to go well, and worked)
i setup account with Tmobile, and it worked, i have had it about 2 months, all OK, until..
i took out SIM to test with my unlocked IPHONE 6+, (i have been thinking of switching all my phones to Tmobile) it also worked OK,
Then i swicthed it back into the Gear S, and the trouble started (unless it was a conincidence),
'Phone not allowed MM#6', it tried everything.
1. reset Gear
2.rebooted thru the gear boot menu
-i called Tmobile, they did not have answer,m they asked me to try a new SIM, which i did online and updated account with new SIM,
same problem.
3.Tmo said maybe not complety unlocked to contact AT&T but i doubted this,
4. I tried a freinds SIM from his Iphone 6+ (on Tmo) it worked great in my Gear Sm and my 'unlocked Ipphone 6'
5. i tried my Gear S SIM in my Iphone, message poped up 'Phone not allowed' (this time no MM#6)
6. called Tmo again (maybe 3rd time) suggested another new SIM card, they everything on there end looks fine, they checked imei, sim card etc, all OK.
i told them from what i have read the forums mentioned a network problem, not a phone problem.
They connected with Samsung, they said they can try reflashing the Gear S, if i send it in to them,
7. i called Tmo again, and i spoke one rep who , GAVE ME A CLUE TO PROBLEM.. he found a note concerning the Gear S,
it said if the user puts the Gear S SIM cards (wiith the 'wearable plan') into another phone, it will block the account until the user reinstalls SIM into Gear S.
8. if this the problem, iit is not reseting itself when SIM is back in Gear S.
9. Not sure what to do next.
the last Tmo rep told to go into Tmo store, and they will try another new SIM, and ask them to try new SIM and my in anoother Gear S, but it seems many tmo stores dont have Gear S on hand, only display it am checking.
10. One idea may be to close the whole account and open new account for the Gear S.
did anybody have luck with this problem?
perdikoylis said:
I also have the same problem...it is frustrating.
i have an unlocked AT&T Gear S ( unlocked thru one of the unlock ebay sites. it seemed to go well, and worked)
i setup account with Tmobile, and it worked, i have had it about 2 months, all OK, until..
i took out SIM to test with my unlocked IPHONE 6+, (i have been thinking of switching all my phones to Tmobile) it also worked OK,
Then i swicthed it back into the Gear S, and the trouble started (unless it was a conincidence),
'Phone not allowed MM#6', it tried everything.
1. reset Gear
2.rebooted thru the gear boot menu
-i called Tmobile, they did not have answer,m they asked me to try a new SIM, which i did online and updated account with new SIM,
same problem.
3.Tmo said maybe not complety unlocked to contact AT&T but i doubted this,
4. I tried a freinds SIM from his Iphone 6+ (on Tmo) it worked great in my Gear Sm and my 'unlocked Ipphone 6'
5. i tried my Gear S SIM in my Iphone, message poped up 'Phone not allowed' (this time no MM#6)
6. called Tmo again (maybe 3rd time) suggested another new SIM card, they everything on there end looks fine, they checked imei, sim card etc, all OK.
i told them from what i have read the forums mentioned a network problem, not a phone problem.
They connected with Samsung, they said they can try reflashing the Gear S, if i send it in to them,
7. i called Tmo again, and i spoke one rep who , GAVE ME A CLUE TO PROBLEM.. he found a note concerning the Gear S,
it said if the user puts the Gear S SIM cards (wiith the 'wearable plan') into another phone, it will block the account until the user reinstalls SIM into Gear S.
8. if this the problem, iit is not reseting itself when SIM is back in Gear S.
9. Not sure what to do next.
the last Tmo rep told to go into Tmo store, and they will try another new SIM, and ask them to try new SIM and my in anoother Gear S, but it seems many tmo stores dont have Gear S on hand, only display it am checking.
10. One idea may be to close the whole account and open new account for the Gear S.
did anybody have luck with this problem?
Click to expand...
Click to collapse
Call tmo back and have them make sure you have the right data plan I had the same problem and mine was on a tablet data plan not mobile/watch plan
I am experiencing a similar issue with TMobile. My thread is in here, http://forum.xda-developers.com/gear-s/help/gear-s-longer-able-to-register-tmobiles-t3040635
I have the factory unlocked international version, SM-R750W, and several people here said it wouldn't work. It worked perfectly for a day, then nothing. New SIM, it worked perfectly again for maybe 5 minutes.
HagbardCelineII said:
I am experiencing a similar issue with TMobile. My thread is in here, http://forum.xda-developers.com/gear-s/help/gear-s-longer-able-to-register-tmobiles-t3040635
I have the factory unlocked international version, SM-R750W, and several people here said it wouldn't work. It worked perfectly for a day, then nothing. New SIM, it worked perfectly again for maybe 5 minutes.
Click to expand...
Click to collapse
Still no luck, but maybe a couple more clues;
1. As the tech support advised, I went to a Tmo store, and they swapped the nano sim , no help.
2. I put in a sim from my friends tmo iPhone. It seemed great.
3. I called tech support back, they escalated problem to the engineering dept,
Said it may take 2 days to hear back...... So far no luck, please let me know if you have better results.
(I did check the plan online and with support to be sure it was correct.- the wearable / watch plan)
I feel it has something to do with there network 'rejecting' my imeo, but support checked that several times, as said it is correct.
perdikoylis said:
Still no luck, but maybe a couple more clues;
1. As the tech support advised, I went to a Tmo store, and they swapped the nano sim , no help.
2. I put in a sim from my friends tmo iPhone. It seemed great.
3. I called tech support back, they escalated problem to the engineering dept,
Said it may take 2 days to hear back...... So far no luck, please let me know if you have better results.
(I did check the plan online and with support to be sure it was correct.- the wearable / watch plan)
I feel it has something to do with there network 'rejecting' my imeo, but support checked that several times, as said it is correct.
Click to expand...
Click to collapse
They escalated my situation as soon as I called them on Tuesday and told me 3 days. Nothing yet.
Have you used the Tmobile IMEI check? http://www.t-mobile.com/verifyIMEI.aspx
I just tried it and it doesn't recognize my IMEI....But if that was going to be a problem, shouldn't that have meant it would never work? I can't think of any reason it would work for a day before they shut it off.
I had same result "did not recognize" with there Imei checker, further, the support reps checked several times and said it is Ok, My gear s is an unlocked AT&T, it did work for the first 2 months (until I removed sim to test in my iPhone ( I was considering switching all my phones to Tmo) Maybe coincidence? + But with a friends sim (from his iPhone ) it worked immediately , it even populated the Apn etc settings, but i did not leave on more than 1-2 minutes to test.
When I put my sim back in, it does not register, it does even show phone number, says:
"Phone not allowed MM#6" and emergency calls only.
I had this same issue come up. The way I solved it was to close out the account for my phone number tied to the watch wearable plan. And then I created a new phone account for the wearable plan with a new number. And got a new sim card from T-Mobile at the time of creating the new wearable plan / number. It seems that the phone number that was previously tied to my galaxy gear s was not blacklisted, but the services were limited on it because I had taken the sim card out of the gear s watch and put it into a cell phone to test if there was service on it. So that flagged the wearable phone number account like I was trying to steal data/phone service from T-Mobile by using the only $15 / month plan on an actual phone. Like said above, the services are supposed to be restored once you put the sim back into the watch, but there is a bug with T-Mobile's service in doing so. So in the end, I closed out the "flagged" account, opened a new account and will never put the sim card into a phone again in the future.
same the issue
snowinjune said:
The same here. I'm from Vietnam. My boss from USA visited Vietnam office and gifted me a T-mobile Gear S with the unlock code from T-mobile. Before unlocking the network, i upgrade it with the latest firmware from T-mobile (R750TUVU1A07). I then inserted a VN carrier SIM and did follow T-mobile guide as below:
After i receive the successful message, i still cant make call or send message. It keep saying that "Mobile network is not available". I tried with 3 nano sim cards from 3 biggest carriers in VN but there is no luck. (These sim cards work well on the iPhone 5).
BTW, the GPS also didn't work, even before or after unlocking with the code. It keep saying "GPS signal too weak. Please connect the Gear to mobile device via Bluetooth" (or something like that).
Click to expand...
Click to collapse
Hi...I have same the issue...now are you solve? You can help me this issue?...thank you
A good looking digital watch
zztoine said:
Hi...I have same the issue...now are you solve? You can help me this issue?...thank you
Click to expand...
Click to collapse
No, i follow this guide to try some features of the Gear S. But my phone become sluggish, and the GPS still not work.
http://forum.xda-developers.com/gea...ll-gear-manager-connect-t2934307/post60592795
So, right now, the Gear S is just a digital watch to me, ha ha.
The error is specifically a sim/network error unfortunately and more importantly this;
9 out of 10 times MM6 error means the phone has been reported lost/stolen and the IMEI has been network blocked.
Here are a few options that could be causing most of the issues I have read;
At&t is NOT open and a fan of allowing devices outside their network. Therefore its possible your device is literally reported as lost/and or locked to at&t and they dont want it on T-Mobile. And your best bet is to raise hell threating an investigation by the FCC.
At&t re-locked your device when att sim is put in.