Need help on resetting ATT_US.ipcc

Hey all,

I recently upgraded to a hacked ATT_US.ipcc that allows me to see MMS (even though it doesn't send) and use tethering (does work).

The only problem is this thing is laggy as hell, and I have no visual voicemail.

I want to get the old ipcc back, so my phone will work as it was working with the 3.0 GM.

Thanks.