For perfect access of mobile phones while bike riding, the best thing you could use is the Roswheel Bike Frame Front Tube Bag. It is an intuitively designed PVC window pouch to store your phones as well as other accessories such as your wallet or sunglasses everytime you tour the city on your bike. By having a headset jack and an audio extension, the bag makes it easy to receive calls or listen to music while riding thus making the...