Lately, my iphone has been having some kind of issue with making outbound calls. When I try to call someone, it has no ring tone, its just silent… For minutes until I just give up. It says its calling the person, but on my end it doesn't, I don't know if they are receiving my attempts to call but I don't think so. I do this like 2-3 times before it actually makes the call successfully.
Why is it doing this and how can I fix it?
Read more: https://iphoneus.org/faq/iphone-5s-sometimes-not-making-outward-calls.html