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

If you don't want certain numbers or contacts messaging or calling you on WhatsApp, you can block them by adding them to your ...

ZDNET's key takeaways Use these codes to forward calls, pay your bill, check balances, etc.Some of the codes work only on certain carriers or devices.One of the codes also might erase your data, so ...