Hi carolynb741! I spike in data usage can definitely be s surprise, let's look into this! Do you use your new device any differently than your old device? Do you have the same connection settings in place? AyaniB_VZW Follow us on Twitter @VZWSupport If my response answered your question please click the "Correct Answer" button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!