Exclamation [Q] How do I fix phone and messaging issues?

When I came back from an overseas flight I finally got signal and 30 text messages flowed in, but I cannot view any of them. When I click the messages icon which has the number of missed texts, it takes me to the messaging screen but it is all blank with nothing there and nothing loads. Also when I tap the phone icon, I can only stay on the keypad, if I click recent, favorites, or contacts, nothing loads either. I'm not sure what is going on but I cannot make calls to anyone unless I memorized their number prior, and I cannot view any text messages. I can only see the quick preview of a current text on the top of the phone. Please let me know if anyone knows how to fix this! Thank you!