Galaxy S III uses unique HDTV Adapter, won't work with existing MHL adapters - The Verge
Mini Micro USB 2.0 MHL to HDMI Adapter Converter Cable HD 1080P for Samsung Galaxy S7 Smartphone and Tablets - Walmart.com
Samsung HDMI Adapter - Micro USB to HDMI for Samsung Galaxy S3, S4
Amazon.com: Geekercity MHL Micro USB to HDMI Cable Adapter, MHL 5Pin Phone to HDMI 1080p Video Graphic for Samsung Galaxy S2, Note 4, HTC M8, HTC One - Only Supports 5Pin Mobile