iOS 15 Trouble: No SIM Card/No Service After Upgrade

Apple iOS 15 officially launched on September 20, including the iPhone 6s series is also supporting the upgrade lineup.

While everyone was upgrading, many users reported that after upgrading iOS 15, the SIM card could not be searched. Another YouTube blogger posted a malfunctioning video that after his iPhone 12 upgraded to iOS 15, a “No Service” reminder appeared in the upper left corner, and the flight mode could not be restored. It was restored after a reboot.

In fact, it is more common that the SIM card cannot be detected after upgrading iOS. Some iPhone users who upgraded iOS 14.8 before received a “no service” prompt from the carrier, indicating that the coverage signal was wrong. No matter if you restart the iPhone, remove the SIM card, or even reset the network settings, it is useless, until you go to the operator store to replace the SIM card.

Update carrier settings

If you still display “No SIM card” after restarting, you can check whether the carrier settings have been updated. Some files of the operator have not been updated or the card may not be read. You can click on the “Settings”-”General”-”About” of the iPhone. If there is an update available, you can select the “OK” or “Update” pop-up prompt to complete the update.

The SIM card cannot be detected due to the upgrade of the system. Generally speaking, it will not be a hardware problem. If the problem has not been solved, you can try to exchange the SIM card to see if it is normal, so as to take the next solution. If the above methods still cannot solve the problem of no service when upgrading iOS 14 to iOS 15, you can try to fix it with FixGo.

Fix iPhone No Service After Upgrade iOS 15

We need to use iToolab FixGo, which can help repair more than 200 iPhone system problems, including failures caused by iOS upgrades.

Step1, Download and install the program

Step2, Choose standard mode to fix iOS 15 issues, this mode will not erase any data. If the standard mode cannot be restored, you can also try the advanced mode.

Step3, Wait for the program to download the firmware and fix your no-service problem. When selecting firmware, if you want to downgrade to iOS 14.8, you only need to download the corresponding firmware, and the system can return to iOS 14.8.

After repairing, iPhone will restart automatically.

There is another possibility that your phone is locked with a carrier, so we recommend that you never upgrade to iOS 15. Once upgraded, your iCCID may become invalid.

Here you can get the latest ICCID code to try to reactivate.

In general, this iOS 15 update has been well received by many Apple fans.