In simple one-call cases, the Phone application looks like this:
a. 
b.
Figure 6-6. Phone application examples: a. Creating an outgoing call; b. Active call going on.
More complex cases, where more than one call is involved, may also happen. The locations and sizes of individual call windows change according to the situation:
a.
b.
c.
Figure 6-7. Phone application, multi-call cases: a. One call active, another on hold; b. One active, one held, one waiting call; c. User is entering a number while another call is active.
When there are ongoing calls, but some other application than Phone is on top, the call windows are reduced into a small pop-up window in the top-right corner.
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