Are you owner of Verizon iPhone 5 and faces high data consumption issue on your iPhone 5 then we have a quick fix for it. This is not an abnormal issue and can be fix very easily. Verizon also made an official statement about iPhone 5 High Data Consumption Issue:
“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.”
To fix this issue you just have update carrier setting by going to Settings > General > About, and wait for the following message:
“Carrier Settings Updated: To install important new settings, tap OK, then press and hold the power button, drag the slider, and restart.”
I hope this will fix your high data consumption issue.