People can’t call me but I can call them

You’ll need to contact your cellular carrier about this.

Lenlenkadil Said:

"My voice call can’t not here: my phone is can’t hear my voice"

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Try Disabling Do Not Disturb:

1. Open: Control Center (Swipe down from the top-right corner of the screen).
2. Tap: Focus
3. Tap: Do Not Disturb (so that it is greyed-out)