i Phone issues

[jimgriff]

I have an apple iPhone 5s. My son has a HTC 1(M7).
He can text and call me fine from his phone and it shows his name from my contact list but I cant text or call him. It's as if he doesn't exist. I'm on the O2 network and he is on EE network.
Any (serious) suggestions to resolve this strange issue?
All other phones in family work fine.

[mixture]

Sounds like an operator issue, Jim, but not as we know it.

(sorry .... serious suggestion follows)

Doesn't exactly sound like an iPhone issue. Have you tried dialling his number manually rather than from your contact list ? Is your iPhone software up to date ?

[gas path]

I think you will find he has inadvertently blocked you as a caller in his contact list.

[jimgriff]

Thanks Gas Path- indeed he had- and no idea how! But now all fixed- Thanks.