I believe I have the exact same model, fortunately i didnt have to do any of what you did. I have model M2-802L. What I want to know is how to enable VoLTE on this tablet? That and if other FDD-LTE Bands can be unlocked? The cpu that the phone carries is compatible for VoLTE, I just dont know how to get it enabled. I know with the samsung qualcomm phones there is a software that will allow you to enable other FDD LTE bands. I also believe the Nexus 6P is able to do the same thing. I wanted to see if maybe you have seen anything like this for our tablet? Thanks.