Verizon customers received an unexpected bonus when they opted for the latest iPhone, but in an unfortunate case of carrier Karma, the necessary sacrifice was their mobile data. An update has been issued to fix a Verizon-specific bug which, "under certain circumstances," used cellular data when connected to WiFi. To plug the potential leak, you'll need to head to the About screen in the phone's Settings, General menu, where you should find a update prompt. Install, then -- importantly -- reboot, and if "Verizon 13.1" shows as your carrier in that same About tab, you know you're safe. We'd also recommend checking your data allowance with crossed fingers -- for what use is LTE if you've already hit your monthly cap?