C5 Ultra Help Needed!

I just recently bought this phone. And i am having problems with sms and calls. My friends cant call me and i cannot receive sms msgs. Weird tho. Cause i have signal bars. I have checked *#*#4636#*#* and it says that gsm: emergency calls only and i am connected to lte/hspa. My carrier most likely sends sms and calls through gsm or 2g and it seems to be non existent on this phone. I have done factory reset and still the same thing. I also have changed sim cards. And still the same. Somebody please help me. :(

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