Don't worry about downloading apps -- your iPhone already has several tools to block all those annoying calls and texts from random numbers.

Your iPhone allows you to block text messages from any number on your device in a few simple steps. You can block contacts already stored in your phone or unknown numbers not stored on your device.

When someone is blocked in FaceTime, Messages or the Phone app, incoming calls will go directly to voicemail. They can even leave you a message that will silently show up in the Voicemail section of ...

Unwanted text messages, while generally not as annoying ... These can also come in the form of spam group texts. However, you can block them on an iPhone and prevent them from reaching you.

One of the most popular tools for identifying unknown callers and blocking spam calls and SMS messages has received new functionality for iPhone.