A huge part of Love Island is the iconic "I've got a text" line.
Whenever there's news for the villa it is normally delivered to the special phones the islanders each have. They all have their real phones whisked away, preventing them from communicating with the outside world, as soon as they arrive.
The islanders are then given devices which are set up so that they cannot contact anyone in the outside world or browse the internet. They are mainly used for producers to contact islanders but the contestants can also text each other and use them to take selfies and videos.