Roaming is when you are not in Pioneer area and using another carriers towers (Off Network). Pioneer has agreements with other cell providers to allow you to use the phone while outside the Pioneer footprint (On Network). Other charges may or may not apply. Pioneer Cellular reserves the right to cancel your service if your billing address is outside the Pioneer network, or if you, or any user of your device, or any user of your account incurs greater than 50% usage outside of Pioneer Cellular’ s network.