You could recognize a USB OTG phone by its micro-AB connector. It's shape allowed the port to receive rectangular connectors (micro Type-A) as well as standard micro Type-B.

Glenair's QPL 83513 Micro-D connectors feature the company's high-density micro TwistPin contacts set on 1.27mm (0.05 inch) centres, with from 9 to 130. About Us; Contact Us; ... Harwin, Amphenol ...

Apple may be forced to drop the Lightning connector for charging the iPad and iPhone in Europe. A European Parliament’s consumer protection committee has voted to standardize smartphone ...