Personal experience:

1. Battery drains super fast (less than 8 hours standby)

2. People couldn't get thru.

3. Iphone super hot.

All the problem i have above, is after jailbreak my i3g and with lots of application.
I took out my sim and leave it there for a day.
The battery are normal, but when i put my sim card back on, the battery drain like water again.
It might be the network setting, i don't know....

My solution is, restore my i3g as new without jailbreak and only with itunes application.
After i restore as new, all the battery problem solved.
i do understand jailbreak helps and hope the 3.1 Firmware will solve the battery problem.

Hope it will help.

This post has been edited by PUPUMAMA: Sep 10 2009, 09:19 PM