Originally Posted by T33H00
I bought a Galaxy S5 (Tmobile) and Unlocked it, flash new ROM. if for some reasons, Tmobile blocked the IMEI, am I still able to use it because its unlocked?
Im asking this because I bought it off from Craiglists.
Short answer: No you cannot.
As I believe a T-Mobile and ATT "contract" (not really a contract, more so an agreement) established a more global blacklist.. well, list, prevents the use on other networks. This is a new policy that has been created.
I even recall an instance where a Verizon S4 (most of Verizon's phone have both CDMA and GSM hardware) would not be allowed on T-Mobile's network.
However, brighter side of things, you could try Swappa.com to sell it as a blocked IMEI phone (i believe they are still usable overseas)
Or, what I would do, part the phone out and sell each part, you will probably get more for it. Screen display's aren't cheap, especially the entire digitizer and LCD still glued together.
For future purchases over Craigslist, ensure the transaction happens inside a T-Mobile store. They can transfer the phone serial and such to your account leaving the previous account holder phoneless. This also ensures that the phone is truly paid off in full. If the phone gets reported lost/stolen, you have proof that it was legally sold to you and not stolen.