How to Sync an Android Via WiFi Only

1. Tap 'Settings' from the Applications list on your device. Different devices have different ways of getting into the list. Your Home screen might say 'Apps' or have an arrow that you can tap to get to the list.

2. Tap 'Wireless & Networks.'

3. Tap 'Mobile Networks.' You will see a 'Data Enabled' listing with a check next to it. Tap the listing to uncheck the box. Your device will now only use Wi-Fi to sync.