Anna has a mobile phone and she's having issues with missing text messages. She's been told a reset will help. Leo says it could and it's not all that bad to do once in awhile. She should just make sure she's backed up all of her images, videos, and music before she does. Apps will just reinstall.
Anna should go into settings, and look for "Backup and Reset." This will backup her settings and apps. Then she can do a factory reset once she logs back into Google. It'll install everything and she'll be back up and running.