Do phone calls with magic jack use a lot of data?

Phone calls made using MagicJack typically use a moderate amount of data, roughly similar to other VoIP services. On average, a standard voice call may consume about 0.5 to 1 MB of data per minute. This means that while it does use data, calls are generally manageable for most internet plans, especially if you're connected to Wi-Fi. However, it's always best to monitor your data usage if you're on a limited plan.