I have lenovo a820, and long time have problem with "Invalid Imei". I have second phone, where all work good. I try make full backup by MTK droid tools ( on good phone), and download by Sp Flash tool to phone without imei. But don't know why, it still don't work. I try one method more, by using MTK Nvram Tool, ( backup on good phone -> restore on phone without imei) still without any changes . And one method: by using "MTK Mobileuncle Tool" but on this when i try send command i have problem "Can't send~~(I don't remember)"
I don't have any idea what i can do now, maybe something is wrong with hardware in phone?
Thanks ALL for any help.
Sorry for my bad english..