I need help unlocking my att Moto X 2014.

What I have done is place a tmobile sim card in the devices. I received a but it just goes away. I have place the correct apn setting in the devices but a signal doesn't show up.

Can someone help me get this phone unlock to use on Tmobile?

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I use a moto g 2014 with stock based ROm,
I have tried cyanogen MOD,Blisspop,Euphoria,Quantum OS .....and MANY Roms .
Each Roms were amazing
how ever after flashing i noticed very fast battery drainage..
Someone says its kernel who can save battery
Anyone can please suggest me Which ROM and Kernel can i use ,
I prefer Blisspop ROM among all, but huge battery drain has become cause of thining :(

Have anyone had trouble with clouding on the 2014 edition? just got one realy cheap but i can realy see clouding when the screen is black. MIGHT be a reason its was cheap though.