Any 928 or Icon users here with Tmobile? Can you send txt msgs?

[AV2RY]

Alright here the thing, I have 928 and anytime I want to txt I have to switch to 2G. It's very annoying. I dont know what but I did something before and it used to work. No idea why but everytime I update my phone (-8.1-Upd 1-Upd 2, Black, Cyan, -no changes by Denim, and other small updates) I always loose internet sharing (fixed) and txting (lost since Upd 1).. I know everybody with 928 had this problem Before, have you guys managed to fix it? or anyone with Icon who has it working?

I dont want to mess up with internet sharing and want txt work too