This tag should be bound to questions relating to wireless cellular network technologies in general.
For specific mobile technologies consider using tags like /gsm /3g /lte.
For other RF technologies consider using tags like /wifi /bluetooth /irda.
Mobile networks is a term used for telecommunication infrastructure using radio frequency physical layer interface with a range of technologies including gsm 3g lte.
Historically, mobile networks provided mostly call services to mobile phones and message services to pagers. Nowadays, mobile networks (or cellular networks) are designed as much for voice services as data services, with the last generation standard, LTE, offering data services only.
This tag should be used for mobile technologies in general; both the client, the protocol, and the service provider side. For specific technologies like gsm corresponding narrower tags should be used.