You can block or unblock a number on an Android phone using the built-in Phone app's "Blocked numbers" menu.

You can't know for sure if someone has blocked you on an Android without asking the person, but there is a method you can use ...

No matter what kind of Android phone you may use, there may come a point when you want to change your number. It's something that could be warranted for any reason — from a desire to mix things up to ...