A client brough me a BLU Studio 5.5C (D690U) which had no IMEI because some other person flashed it. I initially thought of re-flashing it but then decided to do some searching on the Internet and came across this article from http://www.blogtechtips.com/ (http://www.blogtechtips.com/2015/10/05/how-to-repair-imei-number-in-android/).
Asus Transformer Pad TF300T Unlock Bootloader
August 1st, 2016I got a TF300T which was not rooted and had a locked bootloader. I was using it fine but I wanted to unlock the bootloader in case I decide to root in the future. Unlocking the bootloader is quite simple, actually.