Using tools like MTK GSM Sulteng Tool v139 to modify IMEI numbers is explicitly illegal in many countries (e.g., under the US Wireless Telephone Protection Act, UK's Communications Act, or India's IT Act). IMEI changing is associated with stolen phones and fraud. Additionally, circumventing FRP or lock screens may violate the Digital Millennium Copyright Act (DMCA) if it bypasses access controls.
The software provides a robust suite of service features for MTK-powered smartphones, including:
If you need help resolving a specific installation error, let me know the you see. You can also share the brand and model of the phone you want to unlock so I can provide the precise key combination required to trigger the connection boot mode.
Unlock or relock the bootloader safely to prepare the phone for custom firmware installation.