Otium via Amazon has Car Mount Car Phone Holder Long Adjustable Arm with One-button for $5.93 after applying coupon code T4R7RKPQ. Regular price is $10.99. This works with Samsung Galaxy, iPhone, HTC, LG, Huawei and most other phones. This is great for one-handed operation.
Choose Black-1 model and apply coupon code during checkout.
Shipping is free with Prime Membership or with orders over $25.