Have you noticed Verizon cellular data usage increments on your iPhone 5 while connected to Wi-Fi? If so, then you definitely want to apply a recently released carrier settings update, which was issued to Verizon subscribers to fix the issue.
The update will change the Verizon carrier settings from 13.0 to 13.1. Although, under most circumstances, cellular data should not be used while connected to a Wi-Fi network, that appears to be exactly what has been happening for some customers.
To install the update, simply follow these instructions, which were highlighted by MacRumors.
Step 1: Tap Settings > General > About.
Step 2: Wait for the following alert to appear: (top right)
Step 3: Tap OK to install the update.
Step 4: Hold the Sleep/Wake button down until you see “slide to power off”.
Step 5: Slide to power off.
Step 6: After the device powers off, hold the Sleep/Wake button to turn your phone back on.
Once the iPhone 5 reboots, venture to Settings > General > About, and next to Carrier, you should see Verizon 13.1, which is the latest update.
Have you noticed this issue on your Verizon iPhone? Have you already applied the fix?