The IMEI is a 15-digit number unique to every mobile device. It acts as the device's social security number. Mobile network operators use the IMEI to identify valid devices on their network. If the IMEI is missing or invalid, the carrier’s towers cannot "handshake" with your phone, resulting in an inability to make calls, send SMS, or use mobile data.
LG Wing IMEI Repair – What You Need to Know Before Trying Anything
Before diving into the repair process, it is essential to understand what the IMEI is and why its corruption is such a critical failure.
: Confirm the IMEI status by dialing *#06# or checking Settings > General > About Phone > Status .