If you're unable to reach a friend or family member, they may have blocked your number. Here's how to know if someone blocked you.

Here's how to do it. Blocking potential spam calls on Android Android phones have the option of screening spam calls, as long as you're using the default "Phone by Google" app for your calls.

Android now lets you block entire number ranges to combat spam and telemarketing calls. Editorial Note: Talk Android may contain affiliate links on some articles.