Insert the SIM card or the identification of the problem or put to it will not detect any SIM card phone, the Nokia 225 is the solution. As shown on the image below we track down simcard pin connection. Insert SIM card error problem on the device, if we can use it for ease of troubleshooting.
Insert SIM card error.
Phone book inaccessible.
Heat gun / Heat Blower.
Your phone restart.
Clean, remove and re-insert your SIM card.
Check with any other SIM card.
Due to problems
This may be due to dust on the contacts to the SIM jacket.
This may be due to faulty capacitors. If any of them is faulty, then it will affect your overall SIM card function.
The issue could also be due to the SIM card IC.
Insert the SIM card hardware procedure Nokia 225
Clean SIM contacts and Czech jacket.
Change it to any of them is faulty, then with the help of a multi-meter to check all the capacitors.
A jumper to make any of them is faulty, then the SIM card connector with the help of a multi-meter to check the track ways.
All else fails then gently heat the SIM card IC, the method then replace the ball again or IC or remove sim ic and jumper wire a jumper does not help. LINK 1