Chapter 9

To develop Android apps

- A developer can download Android Studio - Included in the download are Android SDK (software developer kit) tools and an Android emulator

Start Over with a factory reset

- A factory reset erases all data and settings Try to back up all data and settings before performing the reset Options: 1. Factory reset from the Settings app 2. Factory reset from a hard boot (Android only) 3. Factory reset and restore from iTunes backup (iOS only)

VPN Connection

- A mobile device can be configured to communicate securely over a VPN - To create a VPN connection in the Settings app, tap VPN, and then tap Add a new VPN Connection Follow directions to complete the connection - Some Android devices also provide proprietary VPN configuration options - To access VPN settings in iOS, open the Settings app, tap General, and then tap VPN

Smart speaker

- Alexa and Echo devices by Amazon - Google Assistant and Google Home - Siri and HomePod by Apple

Sync to an Automobile

Many newer automobiles offer the option to use Bluetooth to pair a smartphone with the car's computer for easy access to the phone's music, navigation, and call features

Software can help secure data:

- OS updates and patches - Antivirus/anti-malware - Trusted sources - Firewalls - Android locator application and remote wipe - iOS locator application and remote wipe

On an iOS device:

- Open the Settings app, tap Cellular Data, then turn off Cellular Data, tap Cellular Data Options, then turn off roaming

Symptoms that might indicate malware might be at work:

- Power drain, slow data speeds, high resource utilization, leaked personal files or other data, strange text messages, and data transmission over limits - Dropped phone calls or weak signal - Unintended Wi-Fi and Bluetooth connections - Unauthorized account access - Unauthorized location tracking - Unauthorized use of camera or microphone

Restart or Reboot the Device:

- Restart (soft boot): For Android, press and hold the power button, select restart - Reboot (hard boot): For Android, hold down the power button and volume-down button at the same time

Screen lock options

- Restrict failed login attempts > Specify that data be erased after a certain number of failed login attempts, or block further attempts - Full device encryption > Encrypts all the stored data on a device - Multifactor authentication > Requires two forms of authentication > Authenticator applications can be installed on your smartphone and configured to provide multifactor authentication support for a variety of account types

Google's approach to security with Chrome OS:

- Sandboxing - Verified boot - Power washing - Quick updates

Lock methods to control access to the device:

- Screen lock - Swipe lock - PIN lock - Passcode lock - Pattern lock - Fingerprint lock - Face lock

Digital Assistant

- Service or app responds to a user's voice commands with a personal, conversational interaction - To perform task and retrieve information

Common Problems and Solutions

- Short battery life - Inaccurate touch screen response - Touch screen not responsive - No sound or distorted sound from speakers - Dim display - Bluetooth connectivity issues - Wi-Fi connectivity issues - Signal drop/weak signal - GPS not functioning - Unable to decrypt email - Apps not loading - App log errors - Frozen system - System lockout - Overheating

You can enhance a smart home network with:

- Smart speaker - includes digital assistant software that is voice activated - Controller hub ( smart home hub) - can control smart devices that use different manufacturer apps and different wireless technologies

Types of Mobile Devices

- Smartphone - Tablets and lightweight laptops - E-readers - GPS - Wearable technology devices - VR/AR headsets

Difference between syncing and backups:

- Syncing mirrors app data and other content among your devices and/or the cloud that use the same Apple or Google account - Backups are copies of app data, configuration settings, and other content stored in case you need it to recover from a failed, lost, or corrupted device

Chrome OS Apps

- The Chrome shelf contains icons for important apps - Most apps open in the Chrome browser - Users can get more apps through the Chrome Web Store app - Some newer Chromebooks support Android apps downloaded through the Google Play Store app

Mobile devices contain few field replaceable units (FRU)

- The cost of replacement, including parts and labor, generally exceeds the value of fixing the device

Automatic syncing options:

- Third-party apps such as OneDrive, Dropbox, etc... - Backup & Sync app with Android - iCloud Drive with iOS

Manual syncing options:

- USB connection and File Explorer - iTunes with iOS

General steps for removing malware from a mobile device:

- Uninstall the offending app - Update the OS - Perform a factory reset

Update the OS

- Updates to Android are automatically pushed to the device from the manufacturer - To check for and install updates on an iOS device, you must first be signed in to your device with an Apple ID > Then open the Settings app and tap > General in the left pane On the right side, tap Software Update

Email can be managed in one of two ways:

- Using a browser - Using an email client

Microsoft Launcher or Continue on PC

- Windows 10 offers an Android app called Microsoft Launcher or an iOS app called Continue on PC

Wired Connections for Accessories

- Wired connections can be used to charge the device, download software updates, upload data to the computer, back up data, and restore software or data - Some USB connectors used for this purpose include: micro USB, mini USB, and the newer USB-C - Newer Apple iPhones, iPods, and iPads use the proprietary Lightning port and connector for power and communication

To configure email on a mobile device, open the email app and add an email account directly in the app Information you need :

- Your email address and password - Names of your incoming and outgoing email servers - Type of protocol your incoming server uses (POP or IMAP) - Security used

Facts about Z-Wave and Zigbee:

- Z-wave transmits around the 900-MHz band and requires less power than Wi-Fi - Zigbee operates in either the 2.4-GHz band or the 900-MHz band, requires less power than Wi-Fi, and generally reaches a range of about 20 m inside - Z-Wave and Zigbee are not compatible - Both Z-Wave and Zigbee devices can connect in a mesh network - Typically, Zigbee and Z-Wave compete about equally for the smart home device wireless standard of choice

Update, Repair, or Restore the System

1. Back up content and settings 2. Update the OS

For Android devices, try these options to repair and restore:

1. Boot into Android Safe Mode 2. Restore from backup

For iOS devices:

1. Reset all iOS settings 2. Restore from backup 3. Reinstall iOS

BYOD (Bring Your Own Device)

- An employee or student is allowed to connect his own device to the corporate network - For security purposes, an organization configures the person's device before allowing it to connect to the network - Utilizes security profiles, which are a set of policies and procedures to restrict how a user can access, create, and edit the organization's resources - Profile security requirements can be partially implemented by configuration requirements placed on BYOD and corporate-owned devices an employee uses > Part of these requirements will likely include installation of a remote backup application

4 Most popular mobile OS:

- Android OS by Google > Based on Linux > Its the most popular OS for smartphones - IOS by Apple > Based on macOS - WIndows 10 Mobile by Microsoft > Based on Windows 10 - Chrome OS by Google > Built on the open source Chromium OS

IOS by Apple

- Apple, Inc. develops, manufactures, and sells the Apple iPhone and iPad > Both use the iOS operating system, developed and owned by Apple - iOS is based on macOS

Developers for iOS (closed source) only have access to APIs, which are calls to the OS

- Apps must be tested and approved before being sold in the App store - Better assurance of high quality apps - Centralized app purchasing

IOS Apps

- Are only available through the App Store - Other developers can write apps for the iPhone or iPad, but these apps must be sent to Apple for close security

Windows Mobile Apps

- Availability of apps are more limited than what can be found for Android or iOS - Obtained through Microsoft Store app - Apps can be obtained from third-party websites via the browser on the mobile device

Android OS by Google

- Based on Linux and uses a Linux Kernel - Use an embedded browser - Manage a database using SQLite - Connect to Wi-Fi, Bluetooth, and cellular networks

Chrome OS by Google

- Chrome OS is deeply integrated with Google's Chrome browser > Most of Chrome OS's native apps open directly in the Chrome browser and rely heavily on having an active Internet connection - Chrome OS functions exclusively on Chromebooks - Chrome OS is automatically updated about every six weeks > Includes some significant security measures to protect the computer from malware

General steps of troubleshooting:

- Close, uninstall, and reinstall an app - Restart the device (called a soft boot) and reboot the device (called a hard boot) - Update, repair, or reinstall the OS, or recover the system from the last backup - Start over by resetting the device to its factory state (all data and settings are lost)

Secure a Mobile Device

- Consider controlling access to your device and consider what apps you can use to protect the data

Internet of Things (IOT)

- Devices connected to the Internet for a specific purpose, such as a smart thermostat

Apple Handoff

- Enable Handoff in the Settings menu on the iPhone or iPad and in the System Preference menu on the Mac

back up and recovery

- File-level backup - Partial image-level backup - Combination of file-level and partial image-level backups

To disable roaming on an Android device:

- Go to the Network & Internet menu in Settings, tap Mobile network, then turn off Mobile data or Roaming

Android provides a way to back up to Google Drive:

- Google Drive backup: enable by opening the Settings app, go to System, and tap Backup (make sure Back up to Google Drive is turned on) - Back up to computer: requires a third-party app or a manufacturer's app - iOS can back up to a computer using iTunes or to the cloud using iCloud: > iCloud Backup: go to Settings and tap the user name, then tap iCloud, scroll down and tap iCloud Backup > iTunes backup: open iTunes on your computer and connect your mobile device to the computer (you might have to enter your device passcode) Select your device and click Back Up Now

Sync to the Cloud

- Google storage in the cloud: Android syncs Google apps or third-party apps on your device to your Google storage at google.com (use the Settings app to manage what is synced) - iCloud storage in the cloud: iOS syncs content to the Apple website at icloud.com To set up iCloud syncing, go to the Settings app, tap the user name, and tap iCloud to go to the screen to manage what is synced

Bluetooth

- Is a short-range wireless technology to connect two devices in a small PAN - Devices must be paired

Windows Mobile by Microsoft

- Is a simplified version of the Windows OS designed for desktops, laptops, and tablets - Windows phones rely primarily on the Start screen for accessing apps

Infrared (IR)

- Is a wireless connection that requires an unobstructed "line of sight" between the transmitter and receiver within 30 m of each other

Near Field Communication (NFC)

- Is a wireless technology that establishes a communication link between two NFC devices that are within 10 cm of each other - Used for contactless credit card payments at a store - An NFC tag contains a small microchip that can be embedded in just about anything Tag dispenses information to any NFC-enabled smartphone or other device

Google Play

- Is the official source for apps

A few tips to keep a mobile device clean:

- Keep OS updates current - Educate users about the importance of privacy settings and not opening email attachments or downloading shared files from untrusted sources - Consider installing an anti-malware app

Cellular Data Connection

- Must have a subscription with your carrier that includes a cellular data plan - Information that might be used when a connection is first made: > IMEI - a unique number that identifies each mobile phone or tablet device > IMSI - a unique number that identifies a cellular subscription for a device or subscriber > ICCID - identifies the SIM card, if the card is used - GSM and LTE require a SIM card installed in the device -

Android apps (open source) can be obtained from many sources

- No assurance of quality - Market is not always convenient for developers - Many variations of Android exist, creating incompatibilities