Hello. Go to My Sprint - My Preferences - Limits and Permissions - Block calls. Select the radio button for blocking inbound and outbound for specific numbers.
Message was edited by: tomdeaver ~ The "Block calls" feature should be working from our site. Are you unable to access the Limits and Permissions page? Are the blocked numbers still able to call your phone?
These are the steps to block call on sprint.com. Are you the administrator on your account? You can always call customer service and they will be able to block numbers for you as well.
To block or restrict voice calls:
Sign in to My Sprint with valid username and password at www.sprint.com.