Ensure that "Mobile Data" is turned on and that "SIM card lock" or "Network lock" options are not active unless you specifically intend to use a third-party carrier lock. Dealing with System Updates and Cache Outdated software or corrupted temporary files can interfere with the operating system's ability to communicate with the SIM card.
Mobile Network Reset Guide to Fix Sim Card Not Detected
Select the option to wipe the cache partition, reboot the system, and check if the SIM card status updates to "Ready. Software and Settings Troubleshooting Modern smartphones manage cellular connections through complex software interactions.
This forces the phone to re-establish a fresh connection with the cellular network and often triggers the system to re-recognize the SIM card. Conversely, if the other device recognizes it, the problem is specific to your original phone's hardware or software settings.
Mobile Network Reset Guide to Re-Recognize Your SIM Card
Discovering your phone is showing a "SIM card not detected" message can be stressful, but this issue is almost always resolvable without professional repair. Factory Reset as a Final Software Fix.
More About How to fix sim card not detected
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