Sorry if this has already been asked. I started using an app that came pre-installed called At&t messages a couple days ago. I found I did not like it so I deleted and canceled the service. Since then my contacts have gone completely crazy. The names are being switched and merged with others along with phone numbers, they are being put with contacts that they do not belong too.I deleted all my contacts to start over and my phone would add them again on its own. I think I fixed that by going online and deleting and re-adding all my contacts on Att address book website. However now my text messages are disappearing. I will be texting someone and the whole conversation will just disappear and only the last couple of recent texts will show. What is going on? How do I fix this? Thank you!