Thank you for visiting the Apple Support Communities, osteoc,
We understand you're having trouble communicating via calls and messages with a specific contact. We'd be happy to help!
We see you have verified that this person is not blocked on your end. We would encourage you to try to find out whether this person has inadvertently done so to your contact information.
If not, we would suggest making sure both you and your contact's devices are up to date: Update your iPhone, iPad, or iPod touch - Apple Support. If you're both up to date on your respective operating systems, we would suggest getting in touch with your carriers to see if there is a problem on their end(s).
Please feel free to respond back if you still need help after that, with the following information:
- What happens when you try to call this person?
- What happens when you try to text them?
- If you receive any error messages, please provide them exactly as they appear.
Cheers!