Iphone 3g Weak signal
 

I have this phone but don't know why the signal are very weak?
most of the time with all the sims the signal point stays at one reason why several times calls cuts out.

what is the problem with the phone?
thank you

try to restore it via itunes.if software issue,then hope fully solve after restore,but u have to unlock it again.this is so easy.so restore it and post result.if u dont know how to restore.let u link.luck
http://www.youtube.com/watch?v=9WU22SR-PVM

tried it but signal are very weak

In network options

enable 3g and check it

Disable 3g and check it

if not solve Check hardware net work an****a cinnector

change antena switch............

Where on board do we find the antenna switch?

I think you need to replace the antenna, is the orange sticker below the loud speaker (where you connect the usb cable to the iPhone).

http://www.mobilehq.com.au/products/...nna%20flex.jpg

If that doesn't work, check your logic board. It might have a crack on the logic board. This worked for me.
How I recovered my iPhone's lost GSM signal!