iphone3g: phone switch off after 5 to 10 minute
 

hi friends
i have a iphone 3G with v4.21 ,
set is getting off after 5 to 10 minute....
then it need to switch on by preesing Menu + power button or in charger ////


pls help me
thanks in advance

wish modem you have ??

What about my prb of 3GS?!

after updating Modem version to 6.15 by Redsnow, and install Cydia i run it then i push "hacker" the phone reboot and stay at apple logo.

I try to restore it but now it off !!

Plz help me !! :confused:

first u must full charge your iphone after that you
1- instal fimware 4.2.1
2-enter your iphone on dfu mode with redsn0w_win_0.9.6rc9
3-with itune restor it with costom fimware iPhone1,2_4.2.1_8C148_Custom_Restore.ipsw

the phone's modem firmware is 6.15 ..(3g)
*.i have checked by placing the mother board in another iphone 3G
(to confirm whether its battery problem or not)..
*. sw restore done again...


but same problem still.....

battry problem dude pls change battry.............

i have already changed battery & charging connector