How do you UnBlock a number on iPhone 4s?

Block Unwanted or Spam Text Messages from Unknown on iPhoneGo to the Messages app.Tap on the message from the spammer.Choose details on the top right hand corner.There will be phone icon and a letter “i” icon across from the number. ... Scroll down to the bottom of the page and then tap on Block this Caller. read more

Step 5: Touch the red dot to the left of the phone number or contact name that you want to unblock. Step 6: Touch the Unblock button to the right of the phone number or contact name. Step 7: Touch the Done button at the top-right corner of the screen. read more

How to unblock a phone number or email address on iPhone and iPad. Launch the Settings app from your Home screen. Tap on Phone, Messages, or FaceTime. Any one of these three sections will work. Tap Call Blocking & Identification if you chose Phone. Tap Blocked if you chose Messages or FaceTime. read more