K800i Firmware upgrade.

Hello.
My k800i has the R1KG001 firmware installed.
its a RED52.
Has anyone upgraded it to RED53 using the last firmware for RED53 R8BF003 firmware?
Is it possible to upgrade a RED52 phone to RED53?
What changes have to be made prior to that upgrade?(if possible)

On CID53 cann't:

* Backup/Restore GDFS
* Reset phone lock code
* Apply script(s)
* Repair EROM

You can stay with CID52 and use lastest software version for CID53, read here: CID53 Firmware into CID52 Phone

thanks a lot for the info.