Update: Torod Neptune, spokesperson for Verizon Wireless, provided the following statement:
“Under certain circumstances, iPhone 5 may use Verizon cellular data while the phone is connected to a Wi-Fi network. Apple has a fix that is being delivered to Verizon customers right on their iPhone 5. Verizon Wireless customers will not be charged for any unwarranted cellular data usage.”
Instructions to install the update.
- Tap Settings > General > About.
- Wait for the following alert to appear:
- Tap OK to install the update.
- Hold the Sleep/Wake button down until you see “slide to power off”.
- Slide to power off.
- After the device powers off, hold the Sleep/Wake button to turn your phone back on.
Note: To finish the installation of the update, your iPhone 5 must be turned off and then turned on again.
After your iPhone restarts, tap Settings > General > About, and then scroll down to Carrier and verify “Verizon 13.1” is displayed.
The issue may be a carryover from the Wi-Fi+Cellular feature that was in the betas of iOS 6 but was eliminated in the final version. One reader below mentions the data leak seems to have occurred while the device is asleep.
@markgurman so that is what happened, my dad used 1.7/2Gb of data because of that, downloading music in sleep mode apparently not over Wifi.—
Will (@dell44223) October 01, 2012