Smartphone Holder for Bicycle

Just make a belt loop like this, to fix a sporting phone belt-holder on the bicycle. Put a small spongle in betveen. For better fix and  amortization. 

Step 1: How to Make a Short Loop.

Then fix the rest of  the  belt loop by rubber peace of camera

Step 2: & on Backpack

can be used the same loop. Then phone is in very good place for  call answering and talking in hands free mode.