The one he sold me was a bad IMEI T-mobile V40 almost new. He open the back, change another 845 CPU to unlock Bootloader, and remove the network lock of sim card, he refuse to tell me the mechanism or he maybe did not know it, just know how to do it. Then he increase the ram and rom to 8+128 by changing them, modify the phone to be Dual-sim version, and change the battery with the V50's 4000mah.
and you still bought it? lol.. surprised the phone is even working..
you sure the phone is not a random chinese copy?