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?
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.
- 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.
- 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.
- 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
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 |
| Tablet | Larger screen (7"+), touch input, iOS/Android, media and productivity apps |
| Smartwatch / Wearable | Fitness tracking, heart rate, notifications, GPS |
| eReader | E-ink display, long battery, sunlight readable, primarily for books |
| GPS device | Satellite navigation, location tracking |
Wireless Technologies
| 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