Troubleshooting & Common Issues
- What does INVALID SIM or SIM NOT SUPPORTED mean?
- How do I check to see if my phone’s software needs to be updated?
- iPhone Text Message Troubleshooting
- iMessage and/or FaceTime are not working, what can I do?
- I have unlimited text but my iPhone says it can't text without data?
- Which apps are using all my cellular data?