📶 Realme C55: Why is my phone not detecting the SIM card?

My Realme C55 has suddenly stopped detecting my SIM card, it shows no SIM inserted even though the card is properly placed. Tried the same SIM in another phone and it worked fine there. Restarting and reseating the SIM tray has not fixed the issue. What could be wrong?

Since the SIM works normally in another phone, the problem is most likely with the Realme C55’s SIM slot, SIM reader, or software rather than the SIM card itself. Try checking for any pending system updates and inspect the SIM tray for damage or misalignment. You can also test another working SIM in the Realme C55. If the phone still shows “No SIM,” the SIM reader or its internal connection may be faulty and should be inspected by a technician. Avoid repeatedly inserting or forcing the tray, as this could damage the slot further.