When is your Samsung Galaxy y using 3g or wifi?

Your Samsung Galaxy Y is using 3G when it connects to mobile data provided by your cellular carrier, allowing you to access the internet on the go. It switches to Wi-Fi when you connect to a wireless network, which typically offers faster speeds and doesn't consume your mobile data allowance. You can check the status in the notification bar, where icons indicate whether you are connected to 3G or Wi-Fi.