need to unlock gu87

i was able to downgrade the software to a21 but then the code reader dont it says press power on .............timeout and thats
where i stopped and had to upgrade software again until ill find a solution please advise anybody

i unlock more then 15 Gu 87 with downgarding then unlock.

some of unlock with ver A22 and some A21 and some A19...

now u can understand what i m saying ..try this way and flash it with ver A19 then try to unlock it may be its work for u .

Thanks n Regards