How to Manage Blocked Phone Numbers on Android
On your Android device, after you have added numbers to your blocking list, you can remove or add additional numbers at anytime within your call and text message settings.
Manage Text Message Block
Go into your text message app, on the first screen where you see a list of all your conversations, click More at the top right.
Select Block messages
On the next page, you can view the list of blocked number, setup phases to block, and view content of text messages that has been blocked. For this guide, we will choose Block list.
On the Block list screen, you can manually enter any number you wish to block and tap the (+) symbol. To remove numbers that were already added, tap the (-) symbol.
Manage Call Block
Go into phone app, and select More
Select Call blocking
Select Block list
Add phone number and tap on (+) to add number to block, or press the (-) sign to remove existing number from the call block list.