Network or signal problem may be the most often occur problem to the mobile phones. It can occur with many cause like drop to the floor, drop in to water, etc. There are several techniques to analyze the network problem. First you can check the network search method. Change it to manual, look if the phone can detect networks, the damage occur in Power Amplifier series, but if the phone can't detect the network, the problem occur in the RF series.
Here, mobile phone repair will share some picture help or jumper tricks to fix or to repair Nokia 3110 classic network or signal problem.
Save the picture help and solve your Nokia 3110 classic signal problem.