Some users need to unlock their device for use with different SIM cards, and certain patched firmwares remove network and region restrictions.
With a patched system, users can install custom launchers, icon packs, and even system-wide themes without restrictions.
Solution: Use Maui Meta Tool or SN Write Tool to restore your IMEI numbers. Keep a backup of your /nvram folder.
Assume you have downloaded a patched firmware ZIP from a reputable source (like 4PDA, XDA Developers, or a dedicated ZTE modding Telegram group).