Hi, something strange happened. I have all my contacs with their names and numbers stored, but when they call me, i only see their number without names. That worked perfect, untill today. Someone had a same issue?
That would have been something worth mentioning. There might be settings that need to be reset. Do you have your local carrier's SIM card in your phone?
I would also call your carrier and explain what is happening.
i had similar problems - but in Messages - where only the contact phone or iMessage email was being shown, not the name of the associated name of the contact.
in my case it was caused by signing out of iCloud and then signing back in.
to fix it what i needed to do was to go into Messages and click on each message and then enter any character in the contact's notes area. and this forced the contact to save and re-sync and then the name of the contact would show.
try doing something similar with Contacts and see if the associated phone calls from that person then show their name.
its not a carrier issue. its a device level issue (at least the solution is).