And on Samsung's recent Android implementations, you'll march into the Connections section of the system settings, then tap "Data usage" followed by "Mobile data usage.".On Google's version of Android 12, you'll head into the Network & Internet section and then tap "Internet" followed by the gear-shaped icon next to your carrier's name and then "App data usage" (whew!).
On more recent versions of the operating system, all the way up until 2021's Android 12 release, you'll open that same Network & Internet section and then tap "Mobile network" followed by "App data usage.". On older Android versions, you'll want to open up the Network & Internet section, then tap a line labeled "Data usage" and select "Mobile data usage" on the screen that appears. The specific steps you'll take from there can vary considerably based on what company made your phone and what version of Android it's running. You have to understand a problem before you can fix it, so start by heading into your system settings.