Managing information about content transmission

A non-transitory machine-readable medium for managing information about content transmission, the machine-readable medium storing instructions for a machine to:

• communicate with a second mobile device via a short-range radio of the first mobile device to either send or receive content;
• tag, at the first mobile device and after the communicating with the second mobile device, the content with a tag identifier, wherein the tag identifier identifies the content and the second mobile device and includes information related to the communicating with the second mobile device;
• and
• transmit to a server, via an additional radio of the first mobile device, data from the tag identifier, wherein the additional radio used for transmitting the data is different from the short-range radio used for communicating the content, and wherein the data is transmitted to the server for analyzing short-range radio transmissions between mobile devices.

A first mobile device comprising:

• a short-range radio;
• an additional radio different from the short-range radio;
• one or more processors;
• and
• a memory comprising instructions which, when executed by the one or more processors, cause the one or more processors to:
• communicate with a second mobile device via the short-range radio to either send or receive content;
• tag, at the first mobile device and after the communicating with the second mobile device, the content with a tag identifier, wherein the tag identifier identifies the content and the second mobile device and includes information related to the communicating with the second mobile device;
• and
• transmit to a server, via the additional radio, data from the tag identifier, wherein the data is transmitted to the server for analyzing short-range radio transmissions between mobile devices.