Dell Aero User Manual page 70

Using the Smartphone
You can switch out of the In call screen by tapping
the Home/Back button to continue using other
features on the phone.
The Ongoing call icon will be displayed in the status
bar during your phone call.
1
1 Ongoing call icon
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Ending a Call
Tap the End call tab to end the phone call.
NOTE: Making a new phone call before ending
the current call places the current call on hold.