From a Home screen, swipe up then navigate: Settings > Connections > Data usage.
Tap Mobile data usage.
Tap the Settings icon then do any of the following:
Change Data Usage Cycle:
Tap Start billing cycle on.
Set the date to match the first day of your billing cycle then tap Set.
Refer to the My Verizon website for billing cycle date.
Set Mobile Data Limit:
Mobile data (cellular data) is disabled upon reaching the specified data usage level indicated by the red limit line. To continue to utilize apps dependant upon a data connection (e.g., Browser, Email, Market, etc.), a Wi-Fi connection can be used or Mobile data must be manually re-enabled (overage charges may apply).
Tap the Limit mobile data usage switch to turn on .
If prompted, review the notification then tap OK to confirm.
Tap Data limit.
Enter the desired limit (e.g., 5GB) then tap Set.
Set Mobile Data Warning:
A notification message appears upon reaching the specified data usage level indicated by the grey warning line.