How to set a limit for data usage on Android phone ?

Is it possible to set a limit for data usage on Android phone, so I will be not charged more than I want ?

To set or change a limit for data usage on Android phone, you have to enable mobile data in quick settings menu or in:
Settings > Connections > Data usage > Mobile data

To make a limit for data usage work correctly, you have set the billing cycle:
Settings > Connections > Data usage > Billing cycle and data warning > Start billing cycle on

Then enable the data usage limit:
Settings > Connections > Data usage > Billing cycle and data warning > Set data limit

And set the data usage limit in gigabites:
Settings > Connections > Data usage > Billing cycle and data warning > Data limit