If you are constantly on your mobile phone, most onlookers might think you have lots of friends and a busy social life.
However, those attached to the phone are likely to be less happy than those who can resist a ring or a message alert, says a study.
Avid mobile phone users also suffer from higher anxiety while students see their class work suffer with lower marks than those who are able to switch off.
Researchers studied more than 500 students to look at their daily phone usage and gauge how it affected their outlook on life.
They found that far from making people feel more connected to friends the phone only heightened their anxiety as many felt obligated to keep in constant touch.
They found users suffered heightened anxiety as many felt obligated to keep in constant touch.
Others had trouble disconnecting from social media sites such as Facebook.
The study by scientists Jacob Barkley, Aryn Karpinski and Andrew Lepp is in stark contrast to previous research that found mobile phones improve social interaction and help reduce feelings of isolation.
Previous research has claimed that mobile phones improve social interaction and help reduce feelings of isolation.