ensure the child device is powered off prior to adding or removing blocks, restrictions, limits, etc.
Changes to these items may take up to 15 minutes to appear on your account.
From the My Verizon app, tap the Menu icon (upper-left).
Tap Verizon Smart Family.
Select the appropriate mobile number.
Tap Limit data usage.
From the Number of GB field, enter the amount of data (e.g., 5.00).
Tap the 'Alert me when the limit...' switch to turn on or off then tap Set limit.
The switch color may differ from the example depicted below.
If off, the user is restricted from further data usage upon reaching the specified limit.
If not visible, tap OK on the keypad to close it.
For additional info on the My Verizon app, check out these FAQs.