How to say "What's your phone number?" in Polish?

ja dzwonię, ty dzwonisz, my dzwonimy

singular	plural
ja dzwonię	my dzwonimy
ty dzwonisz	wy dzwonicie
ona dzwoni	oni dzwonią

Imagine you see a bank robbery. You are very shocked and don't know what to do. You ask your friend if you should call the police. 

O kurcze!
Oh, dear!

Co?
What?

Patrz!
Look!

Dzwonimy na policję?
Shall we call the police?

Tak, dzwonimy!
​Yes, let's call!

Imagine you are at the disco and you meet this beautiful Polish girl. You would like to have her phone number to arrange a date with her. How would you ask in Polish "What's your phone number?"

Jaki jest twój numer telefonu?
What's your phone number?

012344
012344

Dobra, dzięki.
Ok, thank you.

Będę dzwonić.
I will call you.