Some iPhone users saw the Edit button for their iPhone contacts disappear when they installed iOS 5. Find out how to bring it back.

Twitter just added an edit button that lets you edit your tweets up to five times in 30 minutes, exclusive to Twitter Blue subscribers.

One of the reasons that Twitter resisted an edit button for so long was the risk of bad actors abusing the system. For instance, you could amend a tweet that was widely retweeted or embedded in ...