If you want to set a limit for how much data your Android smartphone uses over the course of a month (or any time period), plus a warning that tells you when you are approaching that limit, once again visit Settings, Data usage. Make sure the monthly usage cycle matches that of your phone contract (don't assume it refreshes from the 1st of each month).
In Data usage you will see a large graph detailing how much data you have used over the course of the month. Choose a maximum amount of data that can be used in a month, and when Android should warn you that you are close to that limit. Drag the two horizontal bars across the graph to reflect these choices. Other option is to
1.Open the Google Play Store app .
2 Tap Menu Settings.
3. Tap Auto-update apps.
4. Select an option: Auto update apps at any time: Updates apps at any time, using either Wi-Fi or mobile data.