How do you block a caller's number from calling your cell phone?

To add on to what the other guy is saying, when you select that option in your phone book if you have it, the unknown calls will go directly to your voicemail, so if it is something important then they can still leave you a message. On my LG this function was in my securtiy menu, and it was called restrict calls.

The absolutely free reverse phone lookup sites generally provide the most basic of information such as name and it works only for landlines. To get further information, money will have to be paid. The free searches do not provide much more than what can be found through the phone book or personal knowledge and they only want your email to send spam. Stay away from shady reverse phone lookup sites, most likely you won't get any information after you make the payment. Not to mention you won't get a report and you won't get an answer if you try to call for a refund. Stick with a reputable reverse phone lookup site like ( http://reversephones.info/ ) that has been around since 1999. If I recall correctly they have two options: or you get only one report or for $39 you get unlimited reports. I went with this option because I wanted to verify more numbers. This is how I caught my girlfriend cheating, I got the name, other phone number, address history, relatives, and criminal-court records.

there's two ways to do this: one is delete the number from your address book, and then select the option under the Incoming Call setting that says "allow only contacts in my address book" or wording similar to that. therefore, if a number isn't saved in your address book, they can't connect the call to your phone. the better option is to call your phone service provider and ask them to manually block a specific number and to not inhibit other unknown numbers from calling