iPhone 3gs Signal Problem Repairing Solutions are available in the following article. iPhone 3gs Network Problem Solution information can also be found in the diagrams further in this post.
In iPhone 3gs Signal Problem can occur because of the faulty Network IC also known as Power Amplifier(PA) or Antenna of the Cell Phone or it’s bad connection to the Cell Phone’s Motherboard. Before doing any hardware solutions you should clean iPhone 3gs Antenna Switch, Network IC (PA) and Motherboard of the Mobile Phone.
Here Are iPhone 3gs Signal Problem, iPhone 3gs Network Problem Solution. Please study these diagrams very carefully before you start repairing.
If you have further questions please don’t hesitate to leave a comment.