US Mobile Wireless SIM card that uses Verizon network for the service. It will work your phone on US Mobile Wireless using their bring you own device option if your phone is a Verizon phone or an unlocked phone that is compatible with Verizon. For activation, you will need to go to usmobile.com (and buy a prepaid no-contract month-to-month unlimited plan)  This SIM cannot be used directly with Verizon for an existing Verizon account or a new Verizon account. It can only be used with US Mobile Wireless service and plans. The sale is final. No returns.