It’s really annoying when your Sonim phone won’t let you delete contacts. Oh, you can delete some, just not the ones you want. I finally got fed up enough that I figured out how to do this. First you need to navigate to the applications menu. Next navigate to the Backup and Restore app. Choose backup. You will need to have an SD card installed because that is where backups get written. Now you need … Your Sonim XP5800 Won’t Delete ContactsRead more