Use Maui Meta Tool or SN Write Tool to restore your IMEI numbers. Keep a backup of your /nvram folder.
You're looking for information on a patched firmware for the ZTE Blade A52. Here are some interesting points to consider: firmware zte blade a52 patched
Official firmware updates for the ZTE Blade A52 are designed to address critical security flaws. Historically, ZTE mobile devices have faced unauthorized access vulnerabilities that could allow malicious apps to delete or overwrite system files. Use Maui Meta Tool or SN Write Tool
Since patched firmware files are hosted on file-sharing sites that expire quickly, search Google using these specific queries: Here are some interesting points to consider: Official
In the quiet, neon-lit corner of a small electronics workshop, an old ZTE Blade A52
Stock firmware for your exact model (e.g., European vs. Chinese versions) from repositories like AndroidMTK or FirmwareFile .