Hello AmandaMarie93, we just verified here at Sprint. If you block a number and the number tries to call you the caller will hear the message, "The person you are trying to reach is not accepting calls at this time." This message is then repeated in Spanish. The caller will not be able to leave voicemails. If you block that number from texting as well the blocked number will not receive any notification. You will not be notified of any activity unless you try to text the blocked number. In this case you will be reminded that you have blocked that number from sending/receiving texts from you. Please let me know if you have any other questions. -T.