TT Class 1- Starting with Smartphones
The information in this page will walk through the basics of smartphone technology. Assuming that you have not used a phone in the past, we will cover the common hardware options, the typical software interfaces, and the core concepts related to the functionality of your smartphone.
Course Goals
By the end of these lessons, you will know:
- What is a smartphone, how does it compare to a flip phone or a landline?
- Get to know your hardware interfaces
- Get to know your software interfaces
- What are the differences between the types of mobile operating systems?
- How do you configure and actually use the basic features of a smartphone?
- Contacts and calls
- Camera and viewing media
- Accounts and logins
- Password and MFA concepts
- Personal digital assistant and AI
- Learn the basics of cell communication and about your data networks
- Learn about security, scams, privacy, zero-trust policies, etc
- Other related concepts- What else can a phone do?
- How does a phone work? is 5G safe? can I sleep next to my phone? will it affect other devices eg pacemaker?
- What is Cookies? what is targeted ads?
This course is not designed to provide specific instructions for a specific task, but rather to provide an overview of information to help build intuition in order to accomplish those tasks.
Introduction to Smartphone Concepts
The smartphone is distinguished from a non-smart mobile phone usually by its more robust hardware and software features.
Smartphone Hardware Concepts
A Smartphone often looks like a simple rectangular prism; it's an electric brick. Here are the hardware features of an average smartphone.
External Hardware and Visual Features
- A single flat touch screen on one side. Some newer phones (~2018+) are now able to fold over the glass screen, and/or have more than one screen.
- A camera on both sides.
- One camera faces away from the viewer- looking at the screen shows the world on the other side on the phone, like a looking glass.
- One camera is positioned to see the face of the person looking at the screen, which provides a mirror-like view.
- Some phones have a series of multiple cameras with other supporting features-
- A flash, which can stay on as a flashlight
- A 3d scanner (using 2 cameras)
- or even a lidar scanner
- The edge of the device often has a power button and volume buttons.
- Hidden in the edge of the device is usually a slot for a SIM and SD card.
- This is accessible by sticking a small pin into the correct slot.
- Some phones have a backplate which detaches- this gives access to the same card slots as well as the battery
- The bottom edge of the phone has one of a few types of charging/data ports, and sometimes an auxiliary headphone jack.
- The back side of the phone sometimes has a wireless charging pad underneath the shell.
- Some phone have a fingerprint scanner or other biometric abilities
Internal Hardware Features
The insides of a smartphone are very similar to a computer or cell phone, albeit more advanced to support the smart capabilities. Here are some expected components
- Smart CPU
- Large Data Storage
- Fast Ram
- Big Battery
- Gyroscope/Accelerometer, Compass, and GPS
- Wifi, Bluetooth, Cellular Radios
Smartphone Software Concepts
The most influential smartphone concept is how the visual interface is interacted by the user with one or more fingers on a touchscreen. Older phones (even some older smartphones) have been built around using physical buttons (ie keypad), and navigation is very different between using buttons vs using a touchscreen.
Smartphone OS and Interface
There are two primary operating systems common in smartphones. Both have similarities, and each also has its own distinctions.
iOS
Apple's iOS environment aims to be secure and cohesive. The Apple company has an overall respect for user privacy, yet account setup is relatively simple with everything connected through a login to apple's cloud services.
iPhones and created accounts include a lot of useful free features which are all created or curated by the company for quality and safety.
- Apple User accounts are easily linked with Apple services
- It's easy to use iPhones and Mac computers together- apps and data are easy to sync
- Because Apple has a lot of control over the content of the app store, setup is simple and workflows are streamlined
Android
Android is also secure by default, but also allows different freedoms for the administrator (phone owner) and well as the developer (app creators). Android phones are different from Apple because the level of standardization is smaller, which means the people who build the phone and applications have more independent opinions and processes, so you might find a wider variance of utility and quality on Android devices.
- Android has a more open environment and app selection may have more robust features
- It's easier to install community-made tools
- Because the system is more open, Android is more prominent with bad actors
Other OS Options
Custom setups are optional and, particularly among older phones, the behavior of the system will likely be different than the current standard experience.
- Ubuntu Touch
- Graphene OS
Comparison to Other Device Types
Smartphones are better than non-smart phones in almost every way- although it might not be as straightforward to do.
vs Landlines
Landlines are mounted in the wall, and cell phones are portable.
- Cell phones connect to the network using a grid of towers will cellular radios
- Cell phones have a battery, and can be used in a very large area of service
- Because the connection is wireless instead of a hard wire, quality can vary based on signal strength and network capacity
vs (Non-Smart) Cell Phones
The concept of portable cell phones like flip phones precedes smart phones by just about a decade. That is plenty of time to make technical advancements:
The primary differences between an older flip phone and a newer smart phone relate to the abilities and the interface.
- Making calls on-the-go
- Touchscreen vs buttons
- Available apps and tools
- Camera
- Web browser
- Apps and games
- Overall, the legacy technology is more limited
vs Tablets
The smartphone and tablet development history are parallel with similarities in the mindset surrounding the device. There are some key differences.
- Tablets are often a larger and more powerful iteration of a smartphone
- Bigger screen, battery, processing power
- Most tablets do NOT include cellular network abilities- they connect to Wifi only
- Some providers do create devices with cellular radios and a paid subscription similar to paying for cell service
- Tablets can also connect to a cell phone's shared Wifi hotspot, where applicable
vs Computers
Desktops and laptops often have similar capabilities, but at a different scale.
Some phones are built with a "desktop mode" when a monitor is connected- like a portable computer.
- Newly built computers are designed for processing larger loads of data, using a big powerful machine and lots of electricity
- Data/Word processing, gaming, digital design
- A smartphone is designed to fit as many different things into as small a package as possible
- It can do a lot of different things, but not as heavy things
- Computers store a lot of data on the device, and smartphone have a significant (and optional) integration with cloud storage instead
Using the Smartphone
The below sections describe how you can interact with your phone.
Similar to computer fundamentals, with an understanding of the system, you can build intuition about how to use the device.
Using Hardware
Here is how to use the physical parts of your phone.
Charging
Most new phones include a charging/data cable, and sometimes also an adapter to plug into the wall.
- The most used connection types on the phone are the Lightning cable for Apple devices and USB C for Android devices.
- Some older iPhones have USB C and some older smartphones have micro USB.
- Make sure you match the port in your phone.
- The other end of the cable is usually USB-A, which is the kind that goes into a computer's USB port.
- A wall adapter can allow you to convert a wall socket for USB plugs.
- It's generally safe to keep your new phone plugged in all the time.
- When a phone battery is going bad, it will bloat and expand, causing the phone to appear visibly bulged.
- This is dangerous and the battery should be replaced carefully!
Physical Buttons
Depress the physical buttons to activate them.
- The power button is used to wake up the device and to put it to sleep.
- Holding the button will either turn off the device or activate an AI assistant, depending on the phone and its settings
- The volume rocker is two parts- up and down. There is usually a visual indicator when the volume is changing.
- Some phones have an extra button which can be assigned a specific command
- Or, eg, a dedicated camera button
- Some phones have buttons for Home, Back, and Menu/Options
SIM and SD Cards
- SIM cards are the physical identifier linked to your phone number and data service. This is usually required to connect to cellular networks.
- (it is possible to use a phone with Wifi only)
- SD cards expand the data storage ability, letting you move data using a separate portable and compatible device.
- These cards are usually hidden in a slot on the side bezel of the phone, requiring a thin needle to open
- Older phones have these hidden behind the battery in the back of the device
- It's best practice to turn off the device before opening these slots to prevent data becoming corrupted
Using Software
The smartest part of the phone is how it can interact with your inputs and requests.
Main Interface and Home Screen
The home screen is where your phone first starts when you unlock it, or when you have no other programs or tasks running.
- The home screen is a set of customizable pages showing the apps and programs, and widgets and picture background that have been chosen.
- Use the actions below to navigate
General Navigation
The touchscreen is the primary human input device on smartphones, You can also use your voice to perform certain actions, or set up other accessibility options.
Input Actions
Here are the ways you can touch the screen:
- Tap: press and release the screen one time, as if activating a physical push-button switch
- Double-tap: in quick succession, tap two times on the same spot
- Hold: press the screen and keep the finger held in place for certain actions
- Drag/Slide: While holding, move the finger across the screen, as if sliding a pen on paper
- There are some specific actions which require to drag from one edge of the screen to the other, for example from the top edge down to open notifications, or from the bottom edge up to navigate other settings
- Pinching: using two fingers, press and hold on opposing sides of the screen, then drag the fingers together as if pinching a piece of cloth under the screen
- (also in reverse action, splaying fingers apart)
Lock Screen
A lock screen can be set up to give your phone an extra layer of protection from intruders, or from accidentally activating in your pocket.
- The lock screen has a customizable picture, and sometimes a clock, notifications, or other widgets which can be shown.
- The lock screen can be opened with a swipe, a passcode, a knock, a fingerprint, a facial scan, or by voice (depending on the phone and setup)
- Some features are restricted based on being locked
- EG, you can still take pictures with a locked phone, but cannot access the history of the photo album
- It is possible to set up services that will notify you or encrypt data if an unauthorized break-in is attempted, even if you lost your phone
Managing and Swapping Apps
Navigate to the home screen and select an app to open it.
- Tap the apps button to open a history of your open apps
- Double-tap to quickly switch to your most previous app
- Clear apps using an X button or a swiping action to ensure it is no longer running (for performance reasons)
- It is generally OK to keep a lot of applications open and on standby.
- If your phone is acting slower than expected, consider clearing some of the open apps
Phone Settings
Here are some of the basic settings you should know about.
Sound Settings
Use the volume rocker buttons to adjust the current phone volume.
- By default, the volume will be adjusted for the current sound source
- There are some categories of volume which are changed individually
- Ringer volume- This is how loud the phone will ring when receiving a call or text
- This can be set to vibrate only, which plays no sound but still buzzes
- Or can be completely silent with no buzzer
- Media- Movies, Music, and Games that make noise
- Notifications- Non-cellular popups, whether the phone is open or locked
- System sounds- The quaint clicks, taps, and pops of audio feedback related to button presses
- AI Assistant- The volume of your phone's digital assistant
- Ringer volume- This is how loud the phone will ring when receiving a call or text
Notifications
Within your phone's system settings, and often within each app itself, you are able to change settings about notifications.
These relate to the type and volume of noise your phone will make, as well as whether a pop-up 'toast' notification is allowed to show on the screen being drawn overtop other content on the screen.
- Check for settings in the app as well as in the phone settings when changing notifications.
- Click on a notification to open it.
- Notifications are stored in the top hidden area of your phone. Drag down from the top edge to find them
- Hold a notification for additional options
- Swipe a notification to dismiss it
Call Notifications
Special notes about the toast popup when receiving a phone call:
- Use the green phone option to answer the call and the red one to decline (send to voicemail)
- Swipe the notification away to silence ringing- the caller will continue ringing til the call is automatically sent to voicemail or disconnected
- When the phone is locked, you may need to choose the option and perform a swiping action to confirm. This is to prevent accidental answers/hangups in the pocket.
Permissions
The settings for permissions is what grants apps the ability to do things to your phone, for example to access a hardware/software feature or to connect to a database.
- Only grant the minimum amount of permissions necessary
- Be wary of granting correct permissions
- EG, a camera app will need access to use the camera and microphone hardware, but a crossword game does NOT need this access and could be potentially malicious
Using Applications
Swipe around on your home screen to search for the app you want to use.
- Most phones can search their own contents from the home screen, or from a submenu or widget on the home screen
- Use the app store to search for new applications to install
Making Calls
Find your phone app.
- Use the keypad to directly dial a number, or search your contacts and history for a known user.
- The call history shows accepted calls, missed calls, and sent calls. You can see more detail about the time and duration of your calls in this area.
- Use the Contacts book to manage a list of known contacts.
- You can create a new contact using the + button
- You can update or delete existing contacts by searching for them and using the menu button to Edit
- While in a call, other options will be available, eg add other parties to a group call
Taking Pictures
Find the camera app.
- Look for a rotational icon button to flip between the front and back facing camera
- The default camera settings are usually ok, but you can customize the look by changing settings and filters
- Pictures are stored in a Gallery app, which is sometimes separate from the Camera app.
- To share photos, open the image in the gallery and select the menu option to Share.
- You can select multiple images when in the gallery grid view- Tap and hold one image to begin selecting, or use the menu button to enter this mode.
- Most camera apps can also be used to view QR codes
Using AI
AI is being included with a lot of new products for no additional cost. You can purchase AI subscriptions for better or more secure service, which you may be able to access on your phone.
- Find the AI app or button on your phone.
- Sometimes this is a dedicated physical button, or sometimes you hold a digital button to open the AI interface.
- Most AI tools are conversational- you can talk to them with your voice (or with text) and they will respond in a human-like fashion
- Some AI tools have camera abilities and can identify objects that you take a picture of (like wild flowers or even engine components)
Web Browsing
If you want to do research on your own, you can open up a web browser like Chrome or Safari.
- Most modern web browsers are secure by default and will help you identify known risks
- Some modern web browsers allegedly scrape and sell user data
- Perform a search using the text bar at the top of the screen
- Navigate your different open tabs using the menu options
- Change settings about the webpage and look at stored passwords also using menu options
Installing Additional Mobile Apps
Your phone is made for connecting calls, but it does much more because it's basically a little computer.
Make a good choice by checking the app price and the customer reviews before installing the app. For example, some games look really tempting, but may be full of advertisements or other malicious features.
- Calendar- For scheduling your days and months
- Note taking- For writing things down in a short offline format
- Games- Mobile entertainment
- Music and audiobooks- Listen from anywhere
- Movies- Pass time on the plane
- Social media- Connect with peers
- Shopping- Search the world for that one thing
- Learning- Search the world for that one idea
- ANYTHING else since its a personal computer in your pocket
Additional Peripherals
There are some physical additions your phone can take to make it better.
- A case and screen protector will buffer physical damage on the device
- A wireless speaker or set of earbuds can help you listen with better quality
- Battery/charging supplements keep you moving on the go, even wirelessly
- Stands and mounts can hold your phone in place- use caution while driving!
Other Concepts
The Networks
- Your cellphone uses radiowaves and cell towers to communicate. A SIM card is required.
- Speculation shows different effects related to all types of radio vibrations (3g, 4g, 5g), however modern science shows that cell phones are safe to use when used correctly
- You phone can also use a built-in Wifi module to connect to the internet instead of using cell towers. A SIM card is not required.
- Your phone has a Bluetooth brand wireless module, which is a different type of low-energy communication for small electronic devices like headphones and controllers
- Airdrop is an Apple-specific technology where nearby iOS users can send files to other nearby iOS users, even if these people don't know each other.
- Be aware that radio communication is dependent on a variety of factors including the environment, so results may vary depending on your situation.
Obtaining a Smartphone
If you haven't already chosen a smartphone, it's not too late!
Make the choice based on what you know you need, and don't spend more than you need to.
- Most people use their phone for making calls and checking their bank account. A cheaper phone (80-150 bucks) can perform all of your basic needs.
- It's OK if you still use a flip phone!
- If you like taking pictures, ask about the quality and features of the camera (and note that phones with good cameras tend to be pricier)
Data Safety and Zero-Trust
A zero-trust policy means that everything is assumed malicious and actions are only allowed through a strict whitelist of services or owners.
There is zero amount of trust for anything which is unfamiliar.
Because there is no trust, we will assume actions to be NOT allowed until explicitly added to the whitelist.
A zero-trust mindset will slow the development of malice on your system and will improve your ability to research and make decisions related to the content entering and leaving your system.