ABOUT SIM NOT SUPPORTING
My Iphone x is pta approved but it's shows sim not supporting
My Iphone x is pta approved but it's shows sim not supporting
That message indicates that your phone is locked to a carrier OTHER than the one who provided the SIM you’ve installed.
ONLY the “locking” carrier can release the lock.
How to unlock your iPhone for use with a different carrier - Apple Support
ABOUT SIM NOT SUPPORTING