Limit data use on an iPhone or iPad
You may have recently installed new apps for remote work such as Microsoft Teams and noticed your data usage increase. You might want to limit the use of this app to WiFi. To set whether cellular data is used for apps and services:
Go to Settings > Cellular, then turn Cellular Data on or off for any app that can use cellular data.
If a setting is off, iPhone uses only WiFi for that service.
Check the cellular data usage on your iPhone or iPad
Limit data use on an Android phone or tablet
You may have recently installed new apps for remote work such as Microsoft Teams and noticed your data usage increase. You might want to limit the use of this app to WiFi. To set whether cellular data is used for apps and services, refer to this Google support page.