Manual Solution
- Restart your phone and check.
- Remove, clean and reinsert your SIM card and check.
- Check with any other good and working SIM Card.
- Clean SIM socket contacts with the help of a pin and check.
- If any pin of SIM Socket is broken replace entire SIM socket.
- Re-solder all 6 connections of SIM socket and check.
- Now Check SIM Socket Capacitors for continuity with SIM Socket connections and check as illustrated in picture above. Place jumper in case there is no continuity.
- Check connection between NFC Connection and NFC Chip.
- Now Check 6th pin of SIM Socket connection (Just beside NFC Connection) with Capacitor 4, which is at the back side of the board.