stephendavion writes: Intel has unveiled a 3G modem not much bigger than a UK penny or US one-cent coin, with the aim of embedding it in connected devices around the home. The company says the XMM 6255, with an area of about 300 sq mm, is the world's smallest modem. The standalone chip could be used in wearable tech, as well as security devices such as "smart" smoke alarms. It is built to protect against overheating, and withstand tough conditions. The modem also features an embedded power supply.