Ok so I put 2.0 on my 1st Gen iPhone using the winpwn tool. Ok so it works great but my battery drains SOO fast. So I turned off Location Services in Settings > General and I turned off Push under Settings > Fetch New Data. But the battery still drains quick. And also my email account on Gmail won't work. It carried across my Gmail settings from 1.1.4, however it won't allow me to delete the Gmail account - and when I click on Mail in the dock it looks like its downloading messages but then crashed to the springboard.
I've tried adding another Gmail account but it just overwrites the existing one and continues to NOT work.
Any help? I'm barely getting 8 hours of playtime with low to average use.
EDIT: OK THIS IS A JOKE MY IPHONE JUST SHUT DOWN DUE TO LOW BATTERY WHILE BEING USED PLUGGED IN VIA USB.