Howto fully downgrade to factory defaults.

[bitbonk]

Before I start to experimant with the flashing the ROMS:
No matter what I flash (extended ROM, Radio, ROM), what do I need to backup to downgrade EVERYTHING to factory defaults?
Is all I need to do is run the April/Mai AKU 2.0 Update from T-Mobile? (it was an selfexecuting app) Would that also restore the T-Mobile splash screen?

[nuclear]

Before I start to experimant with the flashing the ROMS:
No matter what I flash (extended ROM, Radio, ROM), what do I need to backup to downgrade EVERYTHING to factory defaults?
Is all I need to do is run the April/Mai AKU 2.0 Update from T-Mobile? (it was an selfexecuting app) Would that also restore the T-Mobile splash screen?
You dont need to backup anything. Once you flash the factory default ROM everything will return to its original state like nothing happened ;) unless you busted your device.
YES!! lol

[bitbonk]

well (how) can I bust my device ?

[nuclear]

well (how) can I bust my device ?
I dont know...something hardware related. Say you busted the USB port? Or the bluetooth or something >.<