If your device no longer recognizes a SIM card or shows "Invalid IMEI," a complete flash file install can restore the modem partitions.
Once logged in, navigate to:
(The exact menu name varies by OEM firmware.) e1200m flash file install
Never, ever disconnect the USB cable while flashing. An interrupted flash file install will corrupt the bootloader, turning your e1200m into an unrecoverable brick. Also, ensure you have selected the correct "Download Only" or "Firmware Upgrade" option based on your goal. If your device no longer recognizes a SIM
Your e1200m is now running a clean firmware. Take these steps to secure your work: Once logged in, navigate to:
⚠️ Warning: Disable driver signature verification on Windows 10/11 before installing MTK drivers.