Does CoverMe upload my address book to CoverMe server?
In CoverMe security settings, you can choose to allow CoverMe to read your contact list or not. As you allow that happen, CoverMe will be able to have access to your phone contact including phone number and names. That’s convenient for CoverMe to check who of your contacts are CoverMe users so that security compatibility will be fast implemented, and end-to-end encryption tunnel can be used to 100% secure your calling and messaging.
There’s no necessity to worry about the security of your phone book and contacts because all your phone numbers are encrypted in an irreversible way and won’t be stored on CoverMe servers after that.