Did You Know Your Phone Has Secret Codes That Can Unlock Hidden Features?

Coders have a storied tradition of creating back doors in programs (or sometimes just fun little Easter eggs) that can only be accessed with a special “key.” This has happened for almost as long as personal computers have existed, and the tradition continues in the mobile age.

Excitingly, many of these backdoors aren’t a secret that only programmers have access to. You can use them yourself via Unstructured Supplementary Service Data (USSD), sometimes known as “quick codes” or…