| Error Message | Cause | Solution | | :--- | :--- | :--- | | | Driver not installed or USB cable bad. | Reinstall MTK VCOM driver; try USB 2.0 port. | | "Page doesn't exist" | Wrong database file (AP/DB). | Extract correct DB from the phone's original firmware. | | "Write IMEI failed: NVRAM corrupted" | Severe NVRAM damage. | Use Format NVRAM option in Maui META (risky) then write. | | Phone shows IMEI but no signal | Baseband / RF calibration lost. | You need a full firmware flash (not just IMEI repair). | | Tool freezes at 10% | Phone battery dead or loose connection. | Replace battery; hold cable firmly. |
In the world of mobile maintenance, "China keypad mobiles"—often powered by MediaTek (MTK), Spreadtrum (SPD), or MStar chipsets—are known for their affordability and simplicity. However, software glitches or accidental NVRAM wipes can lead to an "Invalid IMEI" error, rendering the device unable to connect to cellular networks. china keypad mobile imei repair tool
An IMEI repair tool is a software application that rewrites the corrupted NVRAM partition with a valid IMEI number. Because Chinese keypad phones do not use Qualcomm's high-level encryption for IMEI storage, they are relatively easy to repair. | Error Message | Cause | Solution |