The solution below provides and shows the Sim card circuit connection of the E5 phone and quickly tells us which particular or certain components needs to check during troubleshooting procedures.
Nokia E5 Insert Sim Card Error Problem Solution
Check the VSIM ( sim card supply voltage) and ground pin line paths.
If all of the said components is okay, but the problem continues. The problem may possibly lies on a GAZOO chip. Reheating or reworking it might only fix the problem. And then replace if necessary.