How can I block a phone number on the iPhone (calls / texts)?
Need to block a specific phone number from calling or texting your iPhone? It could be telemarketers, spam text messages, or that crank that won't stop calling and messaging. Apple's iOS does not have a built-in feature to block a phone number, but there are other solutions.
UPDATE: Apple has added a block list to iOS. For instructions on how to block calls, messages and FaceTime with iOS 7 or later click here.