I just bought a prepaid SIM from E-plus in Berlin with a rate of 0.14c/min for voice calls within all networks in Germany and 0.06c for national SMS. I paid E19.95 for the card which included 10 euros of initial credit. I have managed to activate the SIM and use the phone successfully. Due to language barriers I could not get the following 2 questions answered at the E-plus store. Can someone on the forum help me?
1. Are all incoming calls free if I am on the E-plus network anywhere in Germany? Or is this restricted to the Berlin area?
2. How do I check my SIM balance?

Hopefully they don't offer so many different prepaid plans that I have to be even more specific about the plan I purchased
thanks