Mobile Connectivity

Question 1

Your Phone is a Radio

Answer 1

• Baseband radio processor
  
  • A network interface for your radio
  • No Wifi or Bluetooth
• Has its own firmware & memory
  
  • Extremely proprietary
• Real-time operating system
  
  • Everything happens very quickly as needed

-The firmware can updated through the air

Question 2

Phone Updates

Answer 2

• PRL updates
  
  • Preferred Roaming List
  • CDMA networks (Verizon , Sprint)
  • Contains radio bands, sub bands , & service provide id
  • Allows phone to connect to right tower
  • Updated Over the Air (OTA)
• PRI Updates
  
  • Product release instruction
  • Radio settings - ID numbers , network codes , etc
  • Also updated via OTA

Question 3

IMEI & IMSI

Answer 3

• IMEI
  
  • International Mobile Station Equipment Identity
  • Identifies a physical mobile device
  • Every phone has a different IMEI
  • Used to allow or disallow access
• IMSI
  
  • International Mobile subscriber Identity (SIM cards)
  • Identifies user of mobile network
  • Can be provisional in the SIM card

Question 4

Wireless Network

Answer 4

• Enable / Disable cellular , wifi , bluetooth independently
  
  • Airplane mode , conserve battery
• iOS - settings / cellular
• Android = Settings / Wireless & Network Settings
• Windows Mobile = Settings / Wifi

Question 5

Bluetooth

Answer 5

• Short-range Personal Area Network
  
  • About 10 meters
• Connect different devices
  
  • Mouse , keyboard , headset , car , speakers
• Once paired , devices work together
  
  • Connect & disconnect automatically

Question 6

Wireless / Cellular Data Network

Answer 6

• Tethering
  
  • Turn your phone into a wifi hotspot
• Airplane Mode
  
  • One button turns off all radios
  • You can enable individual features

Question 7

VPN

Answer 7

• Virtual Private Network
• Turn your phone into a VPN endpoint
• Integrated into the phone OS
• May require some additional setup
• May support multi-factor authentication
  
  • RSA secure ID