The Octopus card is set to end up attached to iPhones thanks to the company that makes the smart cards it has already combined with watches and key chains.
The new sticker, which has been designed for the iPhone 4 and 4S models, blends communication, travel and shopping into one convenient package.
To ensure the cards function properly, special technology helps prevent interference from mobile phone signals. The new product also serves as a protective skin, protecting phones from scratches.
The card will come in three colours: red, white and black.
It sells for HK$268 and will be available at 7-Eleven stores at MTR stations as well as at the Octopus online shop.