Unstructured Supplementary Service Data (USSD)-sometimes known as "quick codes" or "feature codes"-is an extra-UI protocol, which allows people to access hidden features. secret pathways planted by programmers)? Well, that's actually a thing.Ĭoders have a storied tradition of baking in secret passageways (or sometimes, just fun little Easter eggs) that can only be accessed by inputting a special "key." And so that tradition continues in the mobile age. Remember that scene (Opens in a new window) in War Games when the socially broken code monkeys were explaining to aspiring hacker Matthew Broderick all about "back doors" (i.e. How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.
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