The Sync feature supports the following providers: Google, Yahoo, and Aol. The sync app also supports connecting to other CalDAV/CardDAV servers, such as Nextcloud, but you'll need to be familiar with the setup steps specific to your server to use this advanced option.

1. Press the Menu button and select "Add account"
2. Choose your contacts/calendar sync provider from the list.
3. Enter your email address and press Next.
4. Enter your password and press Next or Sign in. Note: Passwords are case-sensitive and should not contain any extra spaces.
5. Accept the account access permissions (if requested).
6. Your contacts and calendar will now start to sync!
7. After the syncing animation stops, the contacts and calendar events will be synced to the phone. It may take another minute or two until they are fully loaded and displayed in the Contacts and Calendar apps.

If you experience any problems while adding an account, you may find these tips helpful:

1. Make sure your phone is connected to Wi-Fi to provide a reliable data connection.
2. Check if the provider you're using is listed on the compatibility page on our website.
3. If the sign-in fails, double-check your username/password and try again. Remember, passwords are case-sensitive.