Some iPhone 5, iPhone 6, 4S, 3Gs (AT&T, Sprint, Verizon) users had SIM card failure issue. So they can’t call or send a message to someone via iPhone.
Fix 1: Reboot your Apple iPhone
Maybe it’s a small glitch. Restart your iPhone and check the issue.
Fix 2: Turn on/Off Airplane mode
Go to iPhone Settings and turn on and off Airplane mode for some seconds. Then turn off Airplane mode.
Fix 3: Update Carrier Settings
On your iPhone, go to Settings -> General -> About. See any updates available there, Download and install latest updates.
Fix 4: Check your SIM card properly placed
Sometimes this issue might be happened because of the misplaced SIM card. Open SIM Card slot on your phone. Remove the SIM card and place it back again.
Fix 5: Restore your iPhone.
- Backup your device using iTunes.
- Connect your iPhone to a computer via USB cable. Launch iTunes and select your device.
- Select restore option in the Summary panel.
- Your iPhone will restart.
Fix 6: Check your SIM card
Put any other SIM card on your iPhone and check the issue. Sometimes this issue might be happened because of the broken SIM card.
Fix 7: Contact Your SIM card provider
If you can’t fix your issue contact your SIM card provider and explain your issue.
Also, suggest your own solution for this article readers.