Omnia W 7.8 downgrade to 7.5

[xtr02]

Problem here
I update my phone (this tweak with turn on-off internet) and it was fine. I got 7.10 (8862) build. But after few months my battery almost blow off and i buy another (original) the same ofcrs. BUT my phone wont charge this new battery. When i plug power battery icon show me question mark. I found this can be soft problem so i want to downgrade firmware. Now how to do it, i dont have restore point in my zune (is possible download this and downgrade just by zune?)
Help pls, i dont have phone..

 

[ukdey33]

help

Problem here
I update my phone (this tweak with turn on-off internet) and it was fine. I got 7.10 (8862) build. But after few months my battery almost blow off and i buy another (original) the same ofcrs. BUT my phone wont charge this new battery. When i plug power battery icon show me question mark. I found this can be soft problem so i want to downgrade firmware. Now how to do it, i dont have restore point in my zune (is possible download this and downgrade just by zune?)
Help pls, i dont have phone..

I did it before but with zune :/, may be there are another solution without using ZUNE