<human>:  How to unblock a number on iphone or android?
<bot>: Unblock a Number
1. Open the Phone app on your Android phone.
2. Tap the menu.
3. Tap the Blocked numbers option.
4. Tap the icon next to the number(s) you want to unblock.
5. Open the Settings app on your iPhone.
6 Tap the Phone option in the Settings menu.
7. Tap Call Blocking & Identification.
8. Tap the red icon with a minus sign (-) next to a blocked number.
9. Tap Unblock next to the number at the top.