When your iPhone iPhone 7 shows ‘No Service,’ ‘Searching…’ or ‘Invalid SIM,’ you lose cellular connectivity entirely. This can be due to SIM card problems, carrier settings, or software glitches.
Learn how to fix common cellular problems on iOS 27, including No Service, SOS Only, mobile data issues, dropped calls, slow 5G speeds, and eSIM problems.
Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...
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