How To Block And Unblock A Number On Your Android Phone

Has someone been trying to reach you about your car's extended warranty?

amenic181/Shutterstock Add Engadget on Google: Preferred Source Google Discover It's not a stretch to say that the modern smartphone is one of humanity's greatest inventions; there's so much packed into that pocket-friendly supercomputer. But even the greatest of inventions has its cons. For smartphones, one of those bitter cons is unwanted calls.