Flashing a donor or global free NVRAM/NVDATA file will get your device out of its boot loop and fix the corrupted system error. However, it will often leave the device with a generic placeholder IMEI or a "Null" network status.
Find and download the appropriate -GALE-NVDATA file for your device. REDMI 13C POCO C65-GALE-NVDATA NVRAM FILE FREE ...
The is a backup of this specific partition. It is a configuration file that acts as a "dummy" template. By flashing this file, you are essentially rewriting the NVRAM partition structure, allowing the phone to boot up with a valid baseband configuration, rather than a corrupted one. Flashing a donor or global free NVRAM/NVDATA file
Select the appearing MediaTek driver in LibUSB to apply the filter. The is a backup of this specific partition
Hold down both the and Volume Down buttons simultaneously on your phone.
REDMI 13C / POCO C65 (GALE) NVDATA & NVRAM Guide: Fixing Baseband and IMEI Errors
The phone detects the SIM card but cannot register to any cellular network, often showing a "Radio Off" status in engineering modes.