Those who use smartphones based on chinese MediaTek processors aware well of such a problem as an Invalid IMEI Error. What to do if the IMEI is damaged? This occurs most often after installing new firmware or a hard reset of the smartphone. Do not worry, most of these errors are reparable. So, how can we change IMEI Android?
IMEI repairing on Android device does not take much time if you’ve made a backup of device’s NVDATA and NVRAM beforehand.
You have to know where is IMEI stored if you want to backup it. IMEI is stored in NVRAM (Non Volatile Random Access Memory) in devices based on SoC MediaTek (90% of Chinese and 50% of lowcost devices made by well-known manufacturers). In addition to IMEI NVRAM stores data about the calibration of wireless modules, identification information (IMEI, MAC) and settings of some equipment.
There is a separate memory space in device’s firmware which is called the NVRAM. An information from NVRAM is copied to the directory/data/nvram during the first launch of the smartphone. The data in this catalog may be changed by various reasons, including the error when flashing the device.
Before you’ll change IMEI Android it’s important to charge your smartphone for at least 40% if you want to make a backup of IMEI. Further you have to install the drivers for your device and SP Flash Tool.
You should save additionally NVDATA if you have a smartphone based on MT67xx series processors. Do everything in the same way as in the instructions from the point 3.
You should do the same for NVDATA if smartphone based on SoC MT67xx.
Then you should flash a device to a full stock firmware in accordance with your smartphone’s instructions. It is necessary to turn on the phone and do a reset via settings after the firmware. Sometimes you need to flash the full firmware in the Firmware Upgrade mode.
This IMEI firmware must always be stored on a computer or cloud storage service. It also must always been available, cause it is much easier than to modify an incorrect IMEI manually.
The main advantage of this method is that you do not need neither Root nor any additional software. Everything is done directly on your phone. If you want to change the IMEI via the engineering menu, you will need IMEI itself, which you can find on the box from a smartphone or under phone cover.
How to change the IMEI via the engineering menu:
Attention! After AT+ you have to put a space!
Done! You have changed the IMEI via the engineering menu. We recommend insistently to enter the IMEI, which was on the phone, otherwise there may be problems in mobile work.
How did you recover IMEI after flashing your device? Write to us in comments if you have problems and you’ll exactly receive a help.