A: No. NVRAM is not ARB (Anti-Rollback) protected. You can downgrade/upgrade freely.
A: You likely have a corrupted persist partition or failed to flash properly. Try re-flashing using "Firmware Upgrade" mode in SP Flash Tool (but back up user data first). REDMI 13C POCO C65-GALE-NVDATA NVRAM FILE FREE
Disclaimer: This guide is for educational and repair purposes only. Writing fake or mismatched IMEIs is illegal in most jurisdictions. Always use your original, legally assigned IMEI numbers. The author is not responsible for network bans or legal action resulting from misuse. REDMI 13C POCO C65-GALE-NVDATA NVRAM FILE FREE
A: NO. The 5G version uses a different chipset (Dimensity). Using this file will hard brick it. REDMI 13C POCO C65-GALE-NVDATA NVRAM FILE FREE