I purchased it from Craigslist new and paid $430 in September 2013 and used it full 4 months up until the owner either reported lost/stolen or didn't pay the bill (Even tho the couple promised they would not report it to t-mobile whatsoever).
So, anyway, it stopped working with simple mobile, I decided to use it with other carriers. It was on stock 4.2.2 until I did an OTA update to 4.3 (over wi-fi). After that I purchased an unlock code on eBay and was provided with 4 different codes: network, provider, subprovider and defreeze codes.
I put an unauthorized sim and phone prompted to "Network sim unlock pin" screen. I entered the Network unlock code, nothing. I tried 2 times, 3 times, still nothing. the same code prompt screen appears. I have been given a bunch of other solutions with different codes involved, but the phone is irresponsive for most of those codes.
The interesting thing, the phone did not freeze with many unsuccessful unlock code entries. What could be the issue? Could it be settings, software issues? Codes like these *7465625*638*# do not do anything, no action just remains in the dial pad.
Erase and Reset once, through phone Settings>Account> it did not help. I even did it with a code *2767*3855# , same thing. *#0011# goes until "Enter 1" step then gives errors or quits/back to dial pad.
At this point the eBay seller claims he double checked with the code supplier and he confirmed that the codes are valid, and since it did not work he would provide me with 50% refund. I ran out of options.
Anyone have the same issue? Please help.