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4G vs 5G: what is the difference?
In short: 4G is the mature mobile data network most phones have used for over a decade. 5G is the newer generation, with more capacity, lower delay and higher peak speeds, especially in busy places. Real-world 5G speeds vary a lot by area, and 4G remains perfectly good for most everyday tasks.
4G vs 5G in one sentence
4G is the established mobile data network that brought fast internet to phones, while 5G is the newer generation designed for more capacity, faster speeds and lower delay.
Side-by-side comparison
| Feature | 4G | 5G |
|---|---|---|
| Generation | Fourth (widely rolled out in the 2010s) | Fifth (rolling out since around 2019) |
| Typical speeds | Good for streaming, browsing and calls | Often faster, especially where coverage is strong |
| Delay (latency) | Low | Lower |
| Capacity in crowds | Can slow at stadiums and stations | Designed to handle many more devices |
| Coverage | Very wide | Growing; patchier in rural areas |
| Battery use | Well optimised | Can be higher on some phones and networks |
| Needs | Almost any smartphone | A 5G phone and a plan that includes 5G |
What is 4G?
4G (often shown as LTE) made smartphones what they are today: video calls, maps, music and streaming on the move. It is reliable and covers most populated areas. For browsing, messaging and HD video on a phone screen, 4G is usually plenty. Our article How mobile data works explains how masts and SIMs fit together.
What is 5G?
5G uses new radio technology and, in some places, new frequency bands. Some bands travel far but offer moderate speed gains; others are extremely fast but only reach a short distance, so they are used in city centres and venues. 5G also brings features for businesses, such as private networks for factories and ports. Some early 5G networks still relied on 4G equipment behind the scenes, so improvements depend on how far your operator has upgraded.
Which one should you use?
If your phone and plan support 5G, leave it switched on in areas with good coverage. If your battery drains quickly or your 5G signal is weak, setting the phone to prefer 4G can help. You do not need to replace a working 4G phone just for 5G, but when you next buy a phone it will almost certainly include it.
Common mistakes and myths
- "5G is dangerous to health." Mobile networks use radio waves within international safety limits; health bodies have found no evidence that 5G at these levels causes harm.
- "5G replaces home broadband everywhere." It can in some places, but fibre is usually faster and steadier at home.
- "Five bars of 5G always means faster." Signal strength and network load both matter.
- Assuming 5G is on: check that your plan includes it and your phone's mobile settings allow it.
Learn more
Key takeaways
- 4G is mature, widespread and enough for most daily tasks.
- 5G adds capacity, lower delay and higher peak speeds.
- Real 5G performance depends heavily on location and operator.
- Switch to 4G if 5G drains your battery or the signal is weak.
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