Need some info about flashing my rom

[Guest Teake90]

Hello Guys.

I have an omnia i900, and i'm kinda new to the flashing bit, i have done it before, but that was whit a Qtek9100.

i guess it won't differ alot, but just a few questions

- Do i need to flash my phone whit a rom of the same firmware?

- Is it possible to flash the originial samsung rom back ?

- If it is possible to flash the originial rom back, are there any traces left behind from the custom rom?

- Can i also flash windows Mobile 6.5 on my omnia, because of the finger friendly interface?