Mobile Technology Grade 11
Mobile devices have transformed communication and computing. This page covers smartphones, tablets, wireless technologies, and location-based services.
What Is Mobile Technology (T2)?
Mobile technology is any portable, wireless technology that lets you communicate, compute and access information while on the move, without being tied to a desk or a cable. The key idea is mobility: the device travels with you, connects wirelessly, and runs off its own battery.
In South Africa mobile technology is especially important. Many people first reach the internet not through a desktop PC but through a smartphone, because data on a phone is often cheaper and more accessible than a fixed-line connection at home. This makes the smartphone the main computer in millions of households.
Common Mobile Devices Explained
- Smartphone – a pocket-sized computer that combines a phone, camera, GPS, web browser and thousands of apps. It connects through Wi-Fi and the cellular network and is by far the most common mobile device in South Africa. Its key feature is a connection to an app store — a centralised portal where users search for and download software applications.
- Feature phone – a step between a basic mobile phone and a smartphone. It can send multimedia messages, play music, take photos and browse the internet in a limited way, but unlike a smartphone it does not run a full mobile OS or third-party apps — it comes with extra features rather than functioning as a true pocket computer.
- Tablet – a larger touchscreen device, ideal for reading, watching media and light productivity. The bigger screen makes it more comfortable than a phone, but it is less pocket-friendly.
- Phablet – a device between a smartphone and a tablet (screen roughly 5.5"–7"), offering a bigger display while remaining somewhat portable.
- Wearables – devices worn on the body, such as smartwatches and fitness bands. They track health data like heart rate and steps, and show notifications from your phone.
- Smart camera – a digital camera with a built-in operating system (often Android), touchscreen, on-device image processing and Wi-Fi, so photos can be edited and shared straight from the camera or sent wirelessly to a phone.
- GPS – the Global Positioning System uses signals from satellites to work out exactly where a device is on Earth, which is what powers navigation apps.
- Bluetooth – a short-range wireless technology (about 10m) used to connect devices to each other, such as wireless earphones, keyboards or a car's hands-free system.
- Wi-Fi – a wireless technology that connects devices to the internet through a router or hotspot over a medium range, usually inside a home, school or office.
- 4G and 5G – generations of mobile cellular internet. 4G gave us reliable mobile browsing and video; 5G is far faster and more responsive, enabling things like real-time video and large numbers of connected smart devices.
Advantages and Limitations of Mobile Technology (T2)
Advantages – you can work, bank, learn and communicate from anywhere; devices are convenient and always with you; and a single phone replaces many separate gadgets (camera, torch, calculator, GPS).
Limitations – small screens and keyboards are harder to work on for long periods; battery life is limited; mobile data can be expensive in South Africa; and the constant connection raises privacy, security and "always-on" distraction concerns.
Mobile Device Types
| Device | Key Features |
|---|---|
| Smartphone | High-res touchscreen, app store, camera, Wi-Fi, cellular, GPS |
| Feature phone | Calls, SMS and a few extras (camera, music); no full app store or mobile OS |
| Tablet | Larger screen (7"+), touch input, iOS/Android, media and productivity apps |
| Phablet | Screen 5.5"–7", between a smartphone and a tablet |
| Smartwatch / Wearable | Fitness tracking, heart rate, notifications, GPS |
| eReader | E-ink display, long battery, sunlight readable, primarily for books |
| Smart camera | Built-in OS and touchscreen, on-device editing, Wi-Fi sharing |
| GPS device | Satellite navigation, location tracking |
Wireless Technologies
The wireless technologies differ mainly in range, and you can picture it by how far your voice carries. NFC (a few centimetres) is like whispering right into someone's ear — you must almost touch. Bluetooth (~10 m) is like chatting across a room. Wi-Fi (tens of metres) is like calling out across a whole house or hall. 4G/5G cellular (kilometres) is like using a phone to reach someone in another town. The shorter the range, generally the less power it uses.
| Technology | Range | Speed | Use |
|---|---|---|---|
| Bluetooth | ~10m | Low–medium | Headphones, keyboards, file sharing |
| Wi-Fi | 10–100m | High | Internet access via router/hotspot |
| 4G/LTE | Nationwide | 5–100 Mbps | Mobile internet on the go |
| 5G | Nationwide | 50 Mbps–10 Gbps | IoT, real-time VR, autonomous vehicles |
| NFC | ~4cm | Low | Contactless payments, tap-to-share |
Location-Based Computing (LBC)
Software that uses your device's location (via GPS, Wi-Fi, cellular) to provide customised services.
Examples
- Weather apps showing your local forecast
- Uber/Bolt finding the nearest driver
- Food delivery apps delivering to your address
- Google Maps navigation
Social Implications of LBC
| Benefit | Risk |
|---|---|
| Navigation and route planning | Privacy — organisations track your movements |
| Emergency services can locate you | Stalking risk |
| Personalised services | Targeted advertising without consent |
| Find lost/stolen devices | Data sold to third parties |
Connection Speed — Shaping and Throttling
- Shaping — ISP prioritises certain traffic types (e.g. video gets priority over downloads)
- Throttling — ISP intentionally slows your speed after you exceed a data cap