to both a charger and another device simultaneously. These three states are used in the cases of: A charger and either no device or an A-device that is not asserting V (not providing power) are attached. The OTG device is allowed to charge and initiate SRP but not connect. A charger and an A-device that is asserting V (is providing power) are attached. The OTG device is allowed to charge and connect but not initiate SRP. A charger and a B-device are attached. The OTG device is allowed to charge and enter host mode. USB 3.0 introduced a backwards compatible SuperSpeed extension of the micro-AB receptacle and micro-A and micro-B plugs. They contain all pins of the non-Superspeed micro connectors and use the ID pin to identify the A-device and B-device roles, also adding the SuperSpeed pins. OTG micro cables When an OTG-enabled device is connected to a PC, it uses its own USB-A or USB Type-C cable (typically ending in micro-B, USB-C or Lightning plugs for modern devices). When an OTG-enabled device is attached to a USB slave device, such as a flash drive, the slave device must either end in the appropriate connection for the device, or the user must supply an appropriate adapter ending in USB-A. The adapter enables any standard USB peripheral to be attached to an OTG device. Attaching two OTG-enabled devices together requires either an adapter in conjunction with the slave device's USB-A cable, or an appropriate dual-sided cable and a software implementation to manage it. This is becoming commonplace with USB Type-C devices. Smartphone and tablet implementation BlackBerry 10.2 implements Host Mode (like in the BlackBerry Z30 handset). Nokia has implemented USB OTG in many of their Symbian cellphones such as Nokia N8, C6-01, C7, Oro, E6, E7, X7, 603, 700, 701 and 808 Pureview. Some high-end Android phones produced by HTC, and Sony under Xperia series also have it. Samsung Android version 3.1 or newer supports USB OTG, but not on all devices. Host-powered: Sony Ericsson Xperia pro Needs external USB-power: Motorola Droid 4 Specifications listed on technology web sites (such as GSMArena, PDAdb.net, PhoneScoop, and others) can help determine compatibility. Using GSMArena as an example, one would locate the page for a given device, and examine the verbiage under Specifications → Comms → USB. If "USB Host" is shown, the device should be capable of supporting OTG-type external USB accessories. In