ترجمه - ترکی-انگلیسی - Kontörünü neden hemen bitiriyorsun,birazını...

Hi cheesecake,

I think you refer to the credits on a cell phone as "units'. Am I right?
If so, then it would be better as:

"Why do you use up (spend) all your units? Why don't you leave some to use when I write you a message?"

Yes lilian, it refers to the creadits on a cell phone, so thank you I will edit the sentence accordingly.
Btw, I loved your cute, smily avatar

Why do you use up all your prepaid minutes? Keep some and use when I write message to you. I'll call you when I am available. Call me.