I have an older Droid Ultra and never had any problems till this...In July I went to make a phone call from my "recent" list and noticed that the persons name was gone and just showed their phone number. At that time I added them back to my contacts. Yesterday the same thing happened with a few numbers so I again added them back to my contact list. Today I went to text someone I don't contact very often and their number is gone. Somehow their name gets deleted (?) which makes them just a phone number and gone from my list. I don't call a lot of people but I did have phone numbers just in case (I have family all over the US) , and as I just scrolled through my contacts I realize many of them are gone. (Maddening!) I don't turn off my phone, I don't use Cloud, I just use my phone as a phone and the internet a little bit. The only similarity is that I was out of state both times this happened. Any ideas on what may have caused this and how to avoid it happening again?