Originally Posted by jtd930
from my understanding, Verizon Galaxy s5 comes factory unlocked as well as all other verizon LTE phones, although, my t mobile SIM is not working for the phone, i cannot contact verizon as it is on the blacklist for them, i tested with AT&T SIM and the phone does work for GSM so why doesnt it work for my t mobile sim? is it a faulty SIM? i have contacted samsung and t mobile about this and they were no help
There's now a IMEI blacklist that of the major U.S. carriers all share (Verizon, AT&T, T-Mobile, Sprint, as well as some regional carriers). That means blacklisted Verizon phones may not work on T-Mobile or AT&T (in the past, it only meant they wouldn't work on Verizon). Perhaps AT&T hasn't updated their system with the most recent info to include the phone you have while T-Mobile has.
There's always a chance that it's something else, but I have no problems with my S5 (which isn't blacklisted anywhere) on T-Mobile's network with an active T-Mobile SIM.
Current: Galaxy S5, iPhone 5S, Note 10.1 (2014), iPad Mini (Retina)
Previous smartphones: One M8, Note 3, HTC One, Note 2, Galaxy S3, One X, RAZR MAXX, Galaxy Nexus, Rezound, Note, iPhone 4S, Bionic, Stratosphere, Charge, Vitality, Incredible 2, Thunderbolt, Palm Pixi+, Droid 3, Fascinate, Incredible, Droid Pro, Droid 2 Global, Droid X, Droid, Treo Pro, Touch Pro 2, Touch Pro, Q9m, XV6800, XV6900
Previous tablets: Note 8, Nexus 7, TF300, Evo View, Transformer Prime, TF101, Thrive, gTablet