So I picked up a used 32GB Galaxy S3 from some guy on craigslist ($340). it was in great cosmetic shape and i tested it before making the deal by making a phone call (with my SIM). it worked, deal made. we picked up a new SIM, i unrooted (it was kind of a mess), did a full factory wipe/reset and performed all the official t-mobile updates.
the device works fine and can make calls without issue but will not switch to HSPA even when my Nexus 4 and daughter's GNex are on HSPA+. It remains stuck on edge.
Galaxy S3 T999
IMEI matches with the IMEI on the back of the phone
Most recent baseband version (T999UVDLJC)
Flash counter showed 15 but status is normal and allowed me to run t-mo updates. i didn't bother with the triangle away app when unrooting since i did not intend to take it in to be serviced. i just wanted it back to stock for the wife.
I ran through all the troubleshooting with the t-mo tech support and nuthin'. Any ideas/suggestions?
thanks fellas. and yes, i did try searching for this problem. the closest thing i found was people talking about a corrupt IMEI number but the IMEI seems to be fine.