: Improper use can lead to a "permanent brick" or loss of cellular connectivity if the wrong NVRAM data is written.
Some software-level IMEI changes disappear immediately after a factory reset. The Dual IMEI MTK Write IMEI Tool V11 writes the identification strings directly to the hardware-linked NVRAM/NVDATA blocks, ensuring the repair remains permanent across system wipes and standard OTA updates. System Requirements and Prerequisites dual imei mtk write imei tool v11 exclusive