I have read that samsung galaxy S3 has a 11 pin mhl connector and it can support USB OTG as well. Also I have read that the device can power the cable. I didnt quite get what is meant by USB OTG ...
MHL is an emerging standard for connecting mobile devices to HD displays. A lot of new smartphones support MHL via a dual-purpose connector that supports both micro-USB cables and MHL-HDMI adapters. ...