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Wireless Phone Usability


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  • 1. Wireless Usability Issues in wireless phones’ device/service usability Hyun Joo LEE LIS 385 T.6: Software Usability Engineering February 20, 2003
  • 2. Contents
    • Introduction
    • Wireless phone serv ices and networks
    • Wireless connectivity
    • Web-enabled mobile phone usability
    • An insight for the wireless usability testing
    • Conclusion
  • 3. Introduction
    • What is Wireless Usability?
    • : “ the users’ perception of the quality” of wireless device/service, which is based on the” users’ ease of use, ease of learning and relearning” (Barnum, 2002)
    • : the device/service’s intuitiveness for the user, and the user’s appreciation of the usefulness of it
    • Why Wireless?
    • Portability (Mobility), Flexibility, etc.
  • 4. Wireless phone serv ices and networks
    • 1 G : first generation cell phones, analog technology
    • handled only voice
    • 2 G : second generation cell phones, digital,
    • offer data services (text messaging and Web access)
    • 2.5 G : a transitional generation of phones,
    • higher speed data (40 Kbps ~144Kbps) access.
    • General Packet Radio Service (GPRS) networks
    • 3 G : third generation networks, packet switching
    • much higher speed connectivity (384Kbps~ 2 Mbps)
    • - SK Telecom IMT 2000, KOREA(ROK)
    • - NTTdocomo, Japan
  • 5. Devices and 3G PAGERS Mobile phones PDAs COMMUNICATORS Built-in CCD camera Packet data transmission images as e-mail attachments
  • 6. 3G mobile-multimedia phone
    • 1. i-mode
    • i-mode has transformed the mobile phone from a tool for voice communication into an all encompassing information tool.
    • i-mode was developed as a packet-switched high-speed (9600) system.
    • Unlike voice calls, which are circuit-switched connections requiring dial up, i-mode’s data connections are packet switched, meaning the data connection is “always on ”
  • 7. 2. WAP (Wireless Application Protocol)
    • Standard in Europe, North America
    • WAP architecture
    Internet WAP gateway Communication tower Web server Mobile phones
  • 8. Connectivity
    • Connectivity of wireless devices depend on network reliability, power supplies such as battery life and so on.
    • ‘ Always-on’ connections
  • 9. Web-enabled m obile phone usability
    • 1. Consumer issues
    • -Display screen, input devices
    • -Transport
    • -Battery life
    • -Communication
    • -Peripherals and Expansion (Elden, C.R.)
  • 10. 2. focus group
    • novice and savvy,
    • Internet savvy,
    • teenager or senior,
    • phone savvy,
    • everyday consumer,
    • physically challenged,
    • complex application user,
    • online transaction user,
    • high-income and high net worth
    • geo-specific
  • 11. 3.Device and user interface elements
    • Mechanism (selection v. typing )
    • User-centered
    • Consistency
    • GUI (graphical user interface)
    • -Menus, Popup Menus, Text entry fields, Check boxes, Radio buttons, Icons and push buttons
    • Readability- Anti-Glare
  • 12. 4. Device checklist example
    • Is the screen legible under both good and poor lighting?
    • Are the controls intuitive for both voice and WWW use?
    • Can they have be used by people of varying hand size and fingernail length?
    • Can they be one-handed?
    • Do they have a minimum of 6 lines of text visible?
    • Is the screen legible to older users?
    • Is the speaker volume loud enough?
    • rapid-chargers available for road warriors?
  • 13. 5. Service checklist examples
    • Is there adequate service to employee’s offices,
    • travel routes, and homes?
    • Check both voice and web access coverage areas.
  • 14. An insight for the wireless usability testing
    • Ease of use and ease of learning
    • Reliability
    • Situated environment
  • 15. Conclusion
    • Case studies and developing usability procedure are necessary for designing and testing for the wireless devices/services.
    • In the usability study, effectiveness, efficiency, satisfaction of the wireless devices and services based upon users’ perspectives are the three major components to be considered.