Mobile Data 'disconnected because service is unavailable' Htc one M8

I unlocked the bootloader of my Htc One m8 gsm a few weeks ago. I installed TWRP recovery and then cm12. I made a backup of my stock rom before doing a wipe. I then expeirenced that the mobile data was not working on the new rom. I also tried the GPE 5.1 lollipop rom but to no avail. There was a ' ! ' mark beside the service bar and no icon appeared in my status bar whenever I turned mobile data on. Today I restored my phone back to the stock (sense) rom and still mobile data is not workinng.
I can not understand the problem. It just says 'disconnected because service is unavailable'. I have been able to recieve text messages/calls the whole time, just the mobile data does not work.

always disconnected after pairing with Lenovo P780

recently I've bought ASUS zenwatch. But after pairing with my Lenovo P780 running on Kitkat 4.4.2, it's keep disconnected and cannot connect.

I have check my Google Play Service, Google Now, and all programs need to be updated, all checked.
I tried to reset device my zenwatch 5 times, and still after pairing with my P780 it will disconnected. The Initialization was running and the Setup done on my zenwatch, but in my android wear on my phone just gets status Updating. And finally Android wear in my phone just says "Trying to connect" .

I also try to bluetooth connect with manual connect from both my phone and zenwatch, and stll after pairing request, it's just disconnected.

what should i check now? :crying: