Samsung galaxy note 2 T-889 4G connection probelms

[Murtillon]

My Note 2 has been getting some issues lately. My data connection is on E instead of 4G. I called T-Mobile and how to fix it they took me through the steps, but it still doesn't connect to 4G unless I change my network from GSM/WDCMA (auto mode) to WDCMA. Which gives me 4G for 5 minutes. Does anyone know how to fix this error?