Before delving into the advanced troubleshooting methods, conduct some basic checks. Begin with enabling and disabling the airplane mode. This process forces your device to re-establish a connection with the network, which can resolve SIM recognition issues. Swipe down to access the Quick Settings section, tap the airplane icon to enable Airplane Mode, wait for about 30 seconds, and then tap again to disable it.
Next, check the SIM card placement. Incorrect or loose SIM card placement is a common culprit. Switch off your device and carefully eject the SIM card tray. To eject a SIM card, insert a small paperclip or SIM ejecting tool into the tiny hole next to the SIM tray and gently press until the tray pops out. Carefully check the SIM card for any signs of damage or misalignment. When reinserting, ensure it sits properly in the tray and aligns with the contacts in the slot.
With time, dust and debris can collect on the SIM card and in the tray, affecting connectivity. After safely ejecting the SIM card, gently wipe its metallic contacts with a soft, lint-free cloth. Avoid using liquid cleaners as they can damage the card. Also, blow gently into the tray slot to dislodge any dust.
