i hate to tell you that the phone with null or unknown imei on my hand here was just another Lenovo A850 with mtk6582 chip.
This null imei got after flashing a new rom that not suitable but compatible with the chip.
so that this imei cannot be retrieve by using our previous method, delete and restore nvram folder but only by method rewriting the imei using MTK Droid Tool
what you need to do before starting rewrite the imei:
-phone must be root
-usb debugging mode must turn on
-download MTK droid tool software, if it came with compressed … Baca seterusnya