Hisense T5 Plus User Manual page 11

Swipe or slide upward/downward to pick out and touch the target contact. Then you can originate a call.
 Answering incoming calls
Drag the Answer icon towards right to answer an incoming call.
Touch the End icon to end the current conversation.
To reject an incoming call, drag the End icon towards left.
 Managing multiple calls
If you accept a new call when you're already on a call, you can drag the Answer icon towards right to
answer the current calls.
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