mobile

I bought a new OPO,

When i opened the box it looked so cool! i booted the device and then saw the beautiful screen. But then the horror started.
I opened the sim slot. put in my Nanosim and closed it. It asked for my pincode... When i enter my pincode it just went to the mainscreen and gave NO signal. Then 5 seconds later it asked me to enter the pincode again....
Over and over and over. So i thought..... My nanosim is bricked! i went to my provider and gotten myself a NEW MICROSIM. I plugged it into the phone and 1 2 3 guess what..... Same problem. i kept trying and trying watched 50 videos on how to plug in your simcard correctly...Still the same problem. I tried my dads sim, my moms sim (different carrier)....SAME PROBLEM.

Then i unlocked the bootloader, rooted it and flashed Oxygen on it. Guess what.... Same problem. Flashed back to CM11. Same problem.
I think its either an antenna problem, or a simreader problem. Anyone have any idea what i could do and what this issue might be? Also i received the phone in this state. The day itself i already contacted customer support with my complaint. So i assume this is warranty right?..

Heres a small video i made for the support about my problem.

https://www.youtube.com/watch?v=PgESNaPO7Xc

Thanks lads