Q&A for How to Block a Number on Android

You actually can't. I used to have one, and that's one reason I got a new phone.

The only way to block such numbers is by going to your call settings once again and choosing to block anonymous calls.

If you add a number to the reject list as outlined above, it should block all incoming traffic from the number. This includes calls and text messages. It may not block messages through other programs (Gchat, Facebook, etc.) that have messaging programs done via WiFi, however.

Go to your call log and tap the number you want to block. It should bring up a screen that shows when they last called you and a spot for a contact picture. Click the setting button (it looks like 3 dots) in the top right corner and select "add to auto reject list."

Go onto your contacts and click on "Options". Click on "Reject List" and then add who you want to reject.

In your phone app, go to the "recent" tab. Tap on the phone number or entry you want to block to expand the details. Tap on "Call Details." On the detail screen, tap "Block Number." You will be asked if you actually want to block calls from the selected number. Tap "Block" to block the caller.

Just go to your contacts and tap their contact. Then there should be three little dots up in a top corner: tap this and then tap block number.