Holder for securely attaching a smartphone to the handlebars of a bicycle or e-bike. Flexible silicone mount for easy insertion and removal of the smartphone. Simple installation on the handlebar thanks to an individually adjustable rubber band. Suitable for any smartphone with or without a case or protective cover. The bike phone holder is compatible with smartphones that are 6 to 8 cm wide and 13 to 15 cm tall. For handlebars with a diameter of 2 to 3.5 cm. The smartphone is held securely as the corners fit snugly in the silicone bands. The silicone holder protects the smartphone from shocks. Full access to all buttons and ports of the phone, allowing the device to be operated without removing it from the holder, for example, using Face ID or fingerprint sensor.