Facebook didn't take long to roll out Messenger's unsend feature, although it may be a while before you have the option of correcting missteps in your part of the world. Unsending is now available in Messenger's Android and iOS apps in Bolivia, Colombia, Lithuania and Poland, with promises it will be available in other countries as soon as it's possible. The functionality is the same wherever you go, at least. You'll have up to 10 minutes to retract a message, with a marker telling others where the ex-message was. Facebook will keep unsent messages for a short amount of time in order to prevent harassers from using the option to cover their tracks.