If the keypad codes do not work (which happens if the manufacturer has disabled the Engineer Mode), you will need to use a PC-based tool via a USB data cable. 1. RDA Service Tool (Free)
Never change an IMEI to a number you didn't find on the phone’s physical label. Repair only. Restore only. coolsand rda imei repair code best
On the keypad, try *#8378# or *#*#8378#*#* . If that works, you can navigate to "Telephony" and see IMEI info, but you cannot repair it from there. If the keypad codes do not work (which
Coolsand RDA is a popular device used for repairing and unlocking various mobile phones. One of the most common issues that mobile phone users face is IMEI (International Mobile Equipment Identity) problems. IMEI is a unique identifier assigned to each mobile device, and issues with it can lead to network connectivity problems, device blacklisting, and even render the phone unusable. Repair only