call duration on tattoo??

I don't know about the min things...
You can see it in % if you want.
Settings > about this phone > battery use
Maby there is an app for this ?

 

I can't see a way to do this. Seems like a strange omission.

 

Doesn't your provider have some way to check that?

 

There is an way but You need to calculate it by yourself.
Go to contacts > In the bar down at the left .....
It's not clear english but my phone is dutch

 

Found an app for you !
Analyze my Calls | SlideME
Good Luck !