mobile

After many hours of reading and trouble shooting I'm ready to throw my note 3 out a window. I (like a dumb ass) purchased my note 3 from Craigslist. Three months to the day the device was blacklisted do to non payment. After arguing with the police and tmobile I decided to pay to have the imei remotely fixed. Now the phone works but will not automatically connect to 4g or lte. The guy that fixed the imei sweres up and down that his fix has never effected data in this way. If I force lte in the service mode it connects some of the time. Once it's connected if I get a phone call the data drops to G and will not go back to lte. I've checked apns, had metro pcs reset my account, tried different roms, kernels, and modems. If anyone has any advice I would be forever greatful.