Contact names do not display in my call log. This just happened last evening. How can I fix this?

[iMore Question]

Contact names do not display in my call log. This just happened last evening

My calendar is also blank from today going forward. iPhone 5s. Sprint is my carrier

 

[eve6er69]

Re: Contact names do not display in my call log. This just happened last evening

i would try signing out of your icloud on the phone and try signing back in. maybe there was an issue last time it tried to sync.