This is the Samsung B220 Insert SIM card error problem solution. You may refer to the solution below for it shows the connection line paths or line tracks of the samsung B220 Sim card pin connection.
SAMSUNG B220 SIM Card Jumper Ways
1. Check the VSIM voltage 2.9V on PIN#1.
2. Trace the VSIM connection from the capacitor near the UCP300.
3. Check or replace all the capacitors.
4. Rework or replace the UCP300 IC.. end.
