is there anyone known how to fix this...

[mwilmar]

I have XDA I with 3.20.06 radio unit and 4.21 radio stack rom, accidently replace with t-mobile v4.01.16 NK.nbf file using XDAtools....

Can i restore my old rom again or at least back to XDA again.... pleaseeeeee...... :( :( :cry:

[Rudegar]

when you flash the rom it's overwriten and the only way to get it back is if you have a backup or can download the rom from your cellphone company