He worked methodically. First, he imaged the board, copying every sector and logging offsets. He traced the EFS partitions, the NV items that normally stored identity strings. The default tools returned errors—access denied, signature mismatch. So Rafi wrote his own small harness: a script that spoke slowly to the bootloader, mimicking the handset’s own initialization. He learned the board’s quirks—the way the PMIC responded after a cold boot, how a certain GPIO needed a gentle pull to let the debug UART wake.
: With a steady hand, the original IMEI numbers were entered into the repair tool. A click of "Write," and a few seconds of silence followed. The Result: Bars of Life Mt6771 Imei Repair
: You must have the MediaTek VCOM USB Drivers installed so your PC can recognize the device in its preloader/meta state. He worked methodically
Based on repair forum data, these MT6771 devices are the most frequent candidates for IMEI repair: : With a steady hand, the original IMEI