: IMEI modification can sometimes cause data loss or "Invalid IMEI" loops if not done correctly.
How to use Infinity CM2 MTK to write IMEI to Mediatek devices
The is a specialized piece of software used primarily for repairing or writing IMEI numbers on Android devices powered by Spreadtrum (SPD) chipsets. It is often sought after when a phone shows an "Invalid IMEI" error, which can happen after a factory reset or firmware flash. The Story of the Broken Signal