Block callers calling on your cell phone through Google Voice

Image via CrunchBase

The easiest way to block a caller on your phone is via Google Voice. If you don't have a Google Voice account you can now sign up (no invite required). Blocking calls with Google Voice is pretty simple, plus you have the option of sending them directly to voicemail, treating all their calls as spam, or blocking them entirely. Here's how blocking works:

Log in to your Google Voice account.
Find the call you want to block (or the voicemail that resulted from it).
Select the checkbox next to the call or voicemail.
Click the "more" link underneath the call.
Select "Block Caller."