If you own an Android device running on a MediaTek (MTK) processor, you may have encountered a common issue after a factory reset or a bad firmware flash: the "Invalid IMEI" or "No Service" error. This essentially turns your smartphone into a fancy paperweight, unable to make calls or send texts.
What Is an IMEI Lock and How Does It Work? A Complete Guide - floLIVE mobileuncle mtk imei write tool