Use the "Write to NVRAM" or "Save" button. Some versions of the tool, like the MTK NVRAM Tool by Phoenixemer , will create a flashable .img or .zip file for easier restoration. Alternative Tools for NVRAM Management
Enable USB Debugging on your device by tapping "Build Number" seven times in settings to unlock Developer Options. mtk nvram editor
NVRAM is a dedicated partition on MediaTek (MTK) devices that stores data meant to persist even after factory resets or firmware flashes. If this partition becomes corrupted—often indicated by a "Null IMEI" or "NVRAM Warning: Err=0x10" in WiFi settings—the device may lose all cellular and wireless connectivity. Core Features of MTK NVRAM Editor Use the "Write to NVRAM" or "Save" button