You need an application for this. This plug creates its own WLAN and devices are linked to it. Instructions can be found here.
http://www.dlink.com/uk/en/support/faq/mydlink-home/sound-and-vision/dch-m225/uk_dch_m225_how-to-configure-with-an-android-device
No problem with the iPhone. Android phones fail despite special apps, especially when streaming radio or YouTube.
For Apple, I would order the Apple Airport Express.
Greetings