Green bubble people can be made to feel like unwelcome party crashers. Blue bubbles versus green bubbles - in the world of texting, it's the difference between iPhone users and people with Androids.

However, ifeng reported that the specialist portrayed on the Apple website is in fact an indigenous person wearing a traditional hairstyle.

Because the effect was slight and the oldest age group only made up about one fifth ... it is not that difficult for people to escape their [ideological] bubble.” That may be so.