Mobile Devices
the digital signal processor
- A small computer within your smartphone - Analyzes sounds entering your phone through the analog/digital converter - Reduces unwanted noise, moderates speech volume, and even buffers signals to enhance phone call quality
analog digital converters
- Allow smartphones to receive an analog sound wave, such as a person's voice, and digitize it so the phone can process it - "sample" incoming sound waves and convert them to digital signals
base transceiver station
- Broadcasts low-powered microwave signals through the tower antenna - creating "cells" of coverage - Transmits cell phone signals to the mobile switching station
Tethering
- Connecting digital devices - With cell phones: refers to using your cell phone as a hot spot - uses your cell phone's data plan, so monitor usage
the mobile switching station
- Controls transmissions between cell phone towers and their base transceiver station - connects your call with the mobile switching station of the person you're calling - Ensures that your call isn't dropped between cells
syncing
- Copying files from a folder on one device to a folder on another device - Most commonly, this means moving photos and video from your smartphone to a different computer; or music from a computer to a smartphone - syncing allows users to quickly copy files
Blackberry OS
- Known for having a physical, tactile keyboard - Reputation for being very secure
android OS
- Linux based: Open source - Most popular mobile OS worldwide - Focus on 3rd party apps
Short message service (SMS) protocol - texting
- limited to 160 characters - Texts are sent to an SMS center that forwards the unencrypted message to the recipient
roaming
- using other cellular networks besides your own - can be used in areas where your network has no coverage - you must have a provider agreement and it often means additional fees
iOS
-For Apple products only: iPhones & iPads - Most popular mobile OS in U.S. - Focus on Apple apps
Multimedia messaging service protocol (MMS) similar to email
-For longer texts, images -Messages are first sent to an MMS server, where the messages are encoded and stored before being sent
cell phone providers
Also called wireless service providers or mobile network operators
McAfee, Norton, AVG
Many companies offer smartphone security protection such as
iphone OS
Most widely used operating system for smartphones in the U.S
iphone
Reputation for ease of use
microSD
Some phones allow adding ----- storage
solid state
Storage is ----- - no mechanically moving parts, very fast, energy efficient, and durable
xcode and swift
To create an iPhone app use a mac computer and download
Verizon, At&t, sprint, and t-mobile
U.S. cell phone market controlled by
-Basic monthly charges for phone and data -Equipment charges for things like new phones -Taxes and surcharges
all cell phone bills include the same basic info of
4G or LTE
best for streaming or uploading photos or videos
the base transceiver station
found at the base of the cell tower
smartphones
have memory (RAM) and storage
google android
most widely used smartphone OS
20
nearly ---% of all smartphones are iphones
cell phone providers
need physical capability plus a spectrum of radio frequencies
source
originating folder =
cricket, metropcs, straight talk, and tracfone
other cell phone providers besides the major ones
target
receiving folder =
android studio and SDK manager
to create android apps download
3G phones
use less battery life - good for phone calls and texting
speeds, sizes, and prices
ways to compare phone providers
LTE
what is the fastest network speed
3G
what is the slowest network speed
iphones
you cannot add storage to
