Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

Mobile - Mobile Device

The mobile device is termed the MS (Mobile Station) in GSM and the UE (User Equipment) in UMTS/LTE. The capabilities of the device are dependent on the manufacturer, but general features include support for a variety of radio technologies and frequencies, assisting in global roaming. Supported technologies include 3GPP technologies, as well as non-3GPP technologies such as WiFi, Bluetooth and NFC (Near Field Communication). Mobile devices are uniquely identified by their IMEI (International Mobile Equipment Identity), which is tracked by the EIR (Equipment Identity Register) in order to prevent stolen devices from accessing the network. On board the mobile will be a 3GPP SIM (Subscriber Identity Module) or USIM (Universal SIM), depending on the functionality of the device (particularly with respect to supported security algorithms). The SIM/USIM holds subscriber credentials associated with accessing services, such as the subscriber’s IMSI (International Mobile Subscriber Identity) and secret key.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX