downgrade cxv70 sw from 56 to 50

[hotter]

I want to have sw50 because there is more patches for it...
Can i downgrade it with cx70_500300_rus.exe and i dont have this error
Error on waiting for Stat-Data ( http://www.siemensmania.cz/forum/viewtopic.php?t=13690 (when i updated my cxv70 sw41 to cx70_500300_rus.exe it was ok but then i tried to update to cx70_540300_rus.exe and i had this error and i had to take my phone to guarantee they repired it and put sw56))?
And if this error will be i have ff backup of my sw56. they will help or no?

ru:
Я хочу иметь sw50 потому что будет больше заплат для его...
Могу я downgrade он с cx70_500300_rus.exe и я не имейте эту ошибку ошибки на Состояни-Dannyx
( http://www.siemensmania.cz/forum/viewtopic.php?t=13690 (когда я уточнил мое cxv70 sw41 к cx70_500300_rus.exe, котор он был одобрено но после этого я попытался уточнить к cx70_540300_rus.exe и я имел эту ошибку и я должен принять мой телефон к гарантии они зафиксировало ее и положило sw56))?
И если этой ошибкой будет я, то имейте подпорку ff моего sw56., котор они поможет или нет?

[lacibogi]

Try to skip pre- and post chcek in winswup.
Or maybe you have your own fullflash with FW50, then you can restore it.

[hotter]

I had error:
Software update denied by mobile!
So i think i cant to downgrade my mobile

[lacibogi]

Yes, you can.
You should to do EEPROM backup (with patch Open hidden EEPROM blocks).
Than you should restore some FF backup with FW50. If it would be your FF backup you have finished and you have successfully downgraded your phone.

If it wasn´t your FF backup you should to restore EEPROM backup. But don´t forget to apply patch for Open hidden EEPROM blocks.

Than you can enjoy downgraded firmware.

[whitewash]

Or you can change the minimal-FW-possible in bootcore with PapuaUtils...