can make from the Phone app when you wanted to redial a number or call back the
person you previously talked to.
So instead of going to your recents or search
through your contacts and call the previous person you wanted to dial then you
can do it with simple quick taps.
with contact number or contact name will be show at the top.
button again to make the call or simply redial the number.
previous number appears, if you then delete that number by pressing the x, you
will need to enter a number for the redial to work again.
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