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If Nokia 111 have insert sim problem, invalid sim problem, sim not working in Nokia 111. All these sim problems of Nokia 111 can be solve with these few steps that are given in this post.

Keep in mind after dis assembly of Nokia 111 look at the whole mother board for carbon water damages and rust. Make it clean with electronics cleaner and apply heat so that it can be dry smoothly. Do not apply much heat because much heat can harm your skin and may can damage the mother board.
Look at the diagram above that is given to repair Nokia 111 insert sim problem in this post.In this diagram you can see some different color lines these lines are identifying different paths and traks that are used in insert sim function.

Nokia 111 and Nokia 110 Light Solution Ways and Jumper points are in this article. If your phones Lcd Display lights are not working make the jumper as shown in the diagram below. This solution works on all Nokia 110 RM-827, Nokia 1100 RM-810, Nokia 111 RM-811 and Nokia 1110 RM-871.

First of all before making any hardware solutions clean the area behind LCD connector and the whole motherboard to make sure that rust or carbon is not causing this problem. I have marked Nokia 111 and Nokia 110 light ways jumper points in the following diagram. If jumper does not work replace the marked component. Also try replacing the LCD itself because sometime damaged LCD can cause this problem.

Please Note that we will edit these solutions or add new ones if found in this page at any time in the future. So feel free to come back any time on this page to stay up to date.