nokia 110 test mode solution
If you have nokia 110 test mode and local mode problem it can be sole with service of nokia 110 mother board. Check the mother board for water damages and rust. Apply electronics clean and clean it carefully then apply heat so that it can be dry.Keep in mind hot air should not be to much hot because it can harm your skin and can damage the mother board and its parts.
Once you check all these path and tracks with electronics meter apply jumpers if any of these parts is missing. or replace parts those are damage.