Highly stable; official MediaTek support; completely free.

| Tool | Primary Use | Ease of Use | NVRAM Focus | |------|-------------|-------------|--------------| | | General repair, IMEI, MAC | Medium-High | High | | Maui META | RF calibration, IMEI, NVRAM backup | Low (complex) | Medium | | SN Write Tool | IMEI writing only | Medium | Low (only IMEI) | | UnlockTool / Chimera | Professional multi-brand repair | High (paid) | Medium (as feature) |

By mastering these , you can resurrect any MediaTek phone with corrupted identifiers. Always back up your original NVRAM before making changes – that backup is your lifeline. Happy repairing!

Mostly a paid/dongle-based tool (though older cracked versions exist online, which carry security risks). 5. Hex Editors (HxD / Notepad++)