Hi @rmSX13 ,
May I know the device that you are using?
Most of Android smartphones do have data usage feature where you can track the data usage of the phone.
For IOS there is the Usage feature.
For blackberry there are no features for checking but you can download 3rd party applications.
Other data counters:
Hope this helps,
Joking aside though, you may want to dial *143# and choose the option of "My Account" then "Unbilled charges" to see how much data charges you have incurred.
If you are using a "Smart Phone" (should not the user be smart and not the phone?) there are applications which could monitor your downloaded and uploaded data to give you a fair idea of your usage.