Flexible displays using electronic paper technology commonly use Electrophoretic or Electrowetting technologies. However, each type of flexible electronic paper vary in specification due to different implementation techniques by different companies.
On 8 October 2013, the Samsung Galaxy Round was unveiled as the world's first mobile phone with flexible display.[35] Featuring a 5.7" touchscreen display made of flexible material, the phone (and the screen) were curved in shape but the phone itself was solid, thus not allowing its body or the screen to be bendable. The Samsung Galaxy Round was 7.9mm thick and weighed 154 grams.[36] The smartphone ran on Android 4.3 Jelly Bean operating system and was sold for $1000 upon release.