1. Understanding Mobile Devices
Chapter Ten
Understanding Mobile Devices

2. Objectives Covered
3.4 Explain the characteristics of various types of other mobile devices.
Tablets
Smart phones
Wearable technology devices
Smart watches
Fitness monitors
Glasses and headsets
Phablets
e-Readers
Smart camera
GPS
3.5 Compare and contrast accessories & ports of other mobile devices.
Connection types
NFC
Proprietary vendor specific ports (communication/power)
microUSB/miniUSB
Lightning
Bluetooth IR
Hotspot / tethering
Accessories
Headsets
Speakers
Game pads
Docking stations
Extra battery packs/battery chargers
Protective covers / water proofing
Credit card readers
Memory/MicroSD

3. Characteristics of Mobile Devices
Field servicing and upgrading
Input methods
Secondary storage
Field Servicing and upgrading
It has been shown that users are not averse to giving up expandability and replaceable parts as long as functionality and convenience outshine the loss
Android/non-apple – use removable memory and batteries can be changed…not Apple
To service closed mobile devices of any size, it may be necessary to seek out an authorized repair facility and take or send your device to them for service

4. Characteristics of Mobile Devices
Field servicing and upgrading
Input methods
Secondary storage
Input methods
Due to size increased interaction is difficult but modern technology allows for some pretty convenient methods of user input
Multi-touch – more than one contact point
Secondary Storage – no spinning disks, must survive more brutal conditions than laptops (pocket devices), SSD.
Higher capacity versions of
these cards are SDHC, SDXC, miniSDHC, microSDHC, and microSDXC. The standard
versions can hold up to 4GB in storage, HC up to 32GB, and XC up to 2TB

5. Types of Mobile Devices
Tablets
Smartphones
Phablets
e-readers
GPS
Smart cameras
Wearable technology
Tablets:
Gridpad – first commercial tablet, MS-Dos based
Touch screen types:
Resistive – (use stylus or hard object) respond to pressure, and they are highly accurate in detecting the position of the touch and
Capacitive - are a little less accurate but more responsive. They respond to
changes in electrical current, and as such, the human fingertip works great as the facilitator of input.
You can also find keyboard accessories that attach to the tablet
Smartphones:
Most popular computer device in the world today
Any mobile phone with its own processor and operating system can be considered a
Smartphone
Phablet
Blurs the line between smartphones and tablets
It’s a smartphone with a display size between 5” and 7”
E.g. Samsung Galaxy Note

6. Types of Mobile Devices
Tablets
Smartphones
Phablets
e-readers
GPS
Smart cameras
Wearable technology
GPS
Global positioning system (GPS) is a satellite-based navigation system that provides location and time services
United States government manages 32 total GPS satellites covering the globe (24 are available for use, the rest are backups) GPS systems were designed to require multiple satellites. Receivers use a process called triangulation, which they use to calculate the distance between themselves
and the satellites (based on the time it takes to receive a signal) to determine their location.
Smart Cameras, have built-in wireless network connectivity for easy picture and video transfers.
Wearable Technology Devices
Smart watches
Fitness monitor is normally worn on the wrist, and it tracks a user’s movements and heart rate.
Glasses and Headsets – Google glass - Users see an augmented reality (AR) projected display a few inches from their face that was equivalent to looking at a 25” screen from about 8 feet away

7. Connection Types Wired Wireless USB Proprietary Wi-Fi Bluetooth
Infrared (1meter, 30degrees)
NFC
Cellular hotspot / tethering
Bluetooth is used quite often for connecting mobile accessories to a device, particularly
headsets, full-size keyboards, and mice
Steps to connect Bluetooth deveices (pairing):
1. Turn on the Bluetooth device.
a. Enable Bluetooth.
b. Enable pairing.
2. Use your mobile device to locate and select the Bluetooth device
3. Enter the Bluetooth device’s passcode.
4. Confirm pairing on the Bluetooth device by pressing a button or a combination of buttons.
5. Test connectivity.
Infrared
Remember that IR is a short-distance, line-of-sight, point-to-point communication Method
Samsung, HTC, and LG all include IR support, whereas the iPhone does not
Near Field Communication
NFC uses radio frequency (RF) signals, and NFC devices can operate in three different
modes:
■■ NFC card emulation mode, which lets the device act as a smart card. This is useful for
making payments at the site of a merchant who uses NFC enabled register.
■■ NFC reader/writer mode, which allows the device to read information stored in an
NFC tag on a label or poster.
■■ NFC peer-to-peer mode, which allows for ad hoc data transfer between two NFC enabled devices.
Data rates are rather slow compared to other wireless methods, as NFC operates at
106Kbps, 212Kbps, and 424Kbps. It transmits at 13.56MHz.
NFC always involves an initiator and a target.
To read an NFC tag in a poster the phone (initiator) would generate a small RF field that would power the target (Tag)

8. NFC Modified Miller (slow speeds) Manchester coding (fast speeds)
Coding Mechanisms
Modified Miller (slow speeds)
Manchester coding (fast speeds)
Mobile Payments
Apple Pay, Samsung Pay, Android Pay
At the 106Kbps speed, it uses a modified Miller coding (delay encoding) scheme, whereas at faster speeds it uses Manchester coding (phase encoding).
Neither method is encrypted, so it is possible to hack NFC communications using man-in-the-middle or relay attacks.
Because of the limited distance of the RF signals though, hacking is pretty hard to do. The potential attacker would need to be within a few meters to attempt it

9. Hotspots
Cellular mobile hotspot. - you can share your cellular Internet connection with Wi-Fi enabled devices such as a laptop or tablet
Tethering is connecting a device to a mobile hotspot
There are three downsides to using your cellphone as a hotspot:
■■ Speed Multiple devices are now using one cellular connection.
■■ Cost You’re using your cellular data plan, which could result in additional charges if
you go over your data limit. Unless you know that you have plenty of capacity in your
plan, use a hotspot sparingly.
■■ Security -There is a password but no security
Options (fig 10.7).

10. Accessories Headsets Speakers Game pads Docking stations
Battery packs and chargers
Protective covers
Credit card readers
Memory cards and readers