My iPhone has been hacked

If you see No Service or Searching on your iPhone or iPad

1. Check your coverage area. Make sure that you're in an area with cellular network coverage. ... 
2. Restart your iPhone or iPad. Restart your device. ... 
3. Check for a Carrier Settings update. ... 
4. Take out the SIM card. ... 
5. Reset your Network Settings. ... 
6. Update your iPhone or iPad. ... 
7. Contact your carrier. ... 
8. Get more help.

If you see No Service or Searching on your iPhone or iPad ...

Remove your SIM card from the SIM card tray and then put the SIM card back. ... Make sure that the SIM tray closes completely and isn't loose. If you use a SIM tray from a different model iPhone, iPad, or from another phone manufacturer, it might not fit properly.

If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad ...

Learn what to do if you see a SIM not supported alert.

Why does everyone assume that if a computing device doesn’t work as expected the only possible explanation is that it has been hacked? In reality a device that has actually been hacked shows no symptoms of the hack; if it did the hack would be a failure in achieving its objective.

Probably because their vision of a 'hacker' is what they get from ridiculous portrayals on TV or movies and they have no understanding of how computing technology actually works... unlike those of us who actually had to learn things like how to use the command line to do basic things like copying and deleting files, formatting disks, etc. before we could accomplish anything useful... Heck, most of the senior people here have built their own computers from scratch and many remember the days of 300bps modems (and less) in a time when the Internet was nothing but a line item in the DARPA project plan...

The iPhone came out 15 years ago. Ever since then, young-uns have had fully functional tech shoved in their faces with little to no instruction and have amassed a vast empty space where their understanding of the technology should be...

Sorry, we weren’t talking about you specifically, just the fact that everything appears to be a hack to a lot of people. In reality for all practical purposes an iPhone that is kept up to date with iOS versions can’t be hacked.

Your phone has not been "hacked".