I have this phone as well. It came from bell and it is unlocked, I currently am using it on koodo. Everything appears to work okay for me, even tethering via WiFi.
I am having other small problems however,
- Whenever I reset my phone the ringtone goes back to default rather than staying on the custom
- If I select 3g only it still connects to LTE which is horrible reception where I am located.
- Enabling, and then disabling Airplane mode causes my phone to go all sluggish, only way to fix is to reboot.
Any one know of fixes for these issues in 8.1 DP on the t899m? would wolfs custom csc fix these issues?