Bike4 iPhone 4 / 4S Water Resistant Bicycle Mount - Black
Product Review (submitted on January 15, 2013):
I have used this phone holder twice now and it works perfectly with my iPhone 4. Hit a pot hole hard head-on and the case did not miss a beat. Fairly easy to install the phone holder and get the phone in and out of the holder. The iPhone 4 fits like a hand-in-a-glove with a screen protector on the phone, but you will need to remove any other protective case you may have on the phone. Now I can use the great APP I found, and get the weight of the phone out of my jersey's back pocket.
Would you recommend this product to a friend? Never!