Power management by powering off unnecessary radios automatically

A client device comprising:

• data processing hardware;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• establishing an initial communication session with an initial data communication network in an initial geographical area;
• determining an initial set of network quality parameters for the initial data communication network during the initial communication session in the initial geographical area;
• communicating, after associating location information for the client device with the initial set of network quality parameters according to a setting of the client device, the initial set of network quality parameters for the initial data communication network to a network quality server, the network quality server comprising a network quality database storing an aggregate of network quality parameters from a plurality of client devices that includes the client device;
• and
• when the client device moves from the initial geographical area to a second geographical area with a plurality of available data communication networks whose network quality is unfamiliar to the client device:
• receiving, from the network quality server, indicia of network quality for the second geographical area, the indicia of network quality corresponding to network quality parameters collected from other client devices of the plurality of client devices and associated with the plurality of available data communication networks in the second geographical area;
• and
• selecting one of the plurality of available data communication networks in the second geographical area for a second communication session.