Hi - the larger UCONNECT systems can have Twitter, Facebook etc.
You need to have your phone paired, the UCONNECT app installed and a data connection (3G or wifi).
Then move to the apps button and work through the onscreen prompts.
Note that not all parts of UCONNECT work with the engine on, so you will need to check that as you work through (it should prompt you).
2015 500X Pop Star, 1.4