Spectrum sim: the phone detects the sim card, but no internet/calls/sms.
Verizon sim: the phone detects the sim card, there is mobile internet, sending and receiving sms, but I cannot make and receive calls.
(In another phone, both cards are perfect.)
Also facing the same problem along with fingerprint sensor and vibration. I've sent to customer care for this, and after almost 19 days my phone was received and running perfectly. But my happiness stays for 6 days only, again facing problem of sim card error. Don't you have any good engineers in team? Only focusing on profit by selling phones (rather i would call bug boxes) at 50-70k.