Samsung Galaxy J5 error costum bynary blocked by FRP and google account locked

[Peterc555]

Hi, i had the first error with ....FRP to solve i download firmware from sammobile. But now when i turn on the device, keeps me asking old google account. I try to insert a new one it send message to gmail that is authenticated but doesn't unblock the device.
I allready try to bypass, but doesn't work.
When i try to do another firmware update now fails with the message costum lock FRP

Any idea how to clean the old account of google from the device?
Shouldn't the firmware reset the password setting?

 

[MaDaLiNoSt]

You can't. Just use the old account.. If you have troubles contact Google for account recovery. Last solution is Jtag with a new firmware onboard

Sent from my SM-J500F using XDA-Developers mobile app

 

[zelendel]

Just boot into recovery and factory rest and format the partitions before loading the new os.