When will the customer care service call me back?

I have subscribed for a new connection with T mobile just few minutes back. Though they gave a set of instructions through email, it is very confusing and I don't see any live communication method. I have a set of fundamental questions like

1. Will there be a wifi modem given?
2. Will the delivery engineers and activation engineers schedule a time with me before they drop in at my home
3. Is there a way the process can be made faster etc.

But I simply find no method to get an answer for these questions. The last thing I want to do is I keep running around while losing time and effort. So I prefer a call with a customer care executive to get all these answers (for many more questions as well). Will T mobile executive call me?