What Is the Difference Between 4G and 5G and Is It Worth Upgrading for 5G?

[Fam28]

Mobile 4g/5g question for the hive. Is It Worth Upgrading for 5G?

Thanks for answering

[Sharp Scholar]

4G and 5G are generations of mobile network technology that differ in their maximum speeds, latency, capacity and the frequencies they use. Understanding what these differences mean in practice, as opposed to what network marketing claims they mean, helps you decide whether a 5G device makes sense for your situation.

4G LTE at its theoretical maximum provides download speeds of around 150 megabits per second with latency of 30 to 50 milliseconds. In real-world urban conditions the average is closer to 20 to 50 megabits per second download, which is fast enough for streaming video in the highest quality, video calls, large file downloads and almost any other mobile data use case. If your 4G connection is good, the practical ceiling is already above what most activities require.

5G exists in several different bands that have very different characteristics. Sub-6GHz 5G, which is what most people with a 5G phone actually use most of the time, offers modestly faster speeds than 4G and somewhat lower latency but uses similar infrastructure and has similar coverage. Millimetre wave 5G, mmWave, offers genuinely extraordinary speeds, theoretically gigabit-class downloads, but has extremely short range and poor building penetration, limiting it to dense urban environments and specific venues like stadiums. If you have seen a 5G speed test showing 1.5 gigabits per second, it was almost certainly mmWave in a specific location.

The honest assessment for 2026 is that the benefits of 5G are real in specific circumstances and negligible in most. For dense events where many people need connectivity simultaneously, 5G's capacity improvements matter. For autonomous vehicle and industrial IoT applications its low latency matters. For most daily phone use in a city with good 4G coverage, the difference in experience is marginal. The case for a 5G phone in 2026 is mainly future-proofing as 4G networks begin to be decommissioned toward the end of the decade.

[DeepCourier]

The sub-6GHz versus mmWave distinction is the thing marketing materials almost never explain because mmWave coverage is so limited that most customers would not choose 5G devices if they understood that the advertised performance only applies in specific locations

[Yasmin_63]

In areas with good 4G coverage the speed difference in daily use is difficult to perceive. Streaming, social media, navigation and even video calls do not require more bandwidth than 4G already provides adequately

[HeartbreakKidCurtis18]

5G coverage in the UK outside major cities is still poor in 2026. If you live in a rural or suburban area, a 5G phone will spend most of its time on 4G anyway and the 5G premium is wasted. The latency improvement in 5G matters more for specific applications than for consumer use. Online gaming on mobile is genuinely better with lower latency. Most other mobile use cases are not latency-sensitive in the way that gaming is

[TheRock96]

The battery impact of 5G connectivity has improved significantly from early 5G devices but 5G radios still consume more power than 4G radios when active. Phones with smaller batteries may see meaningful battery differences with 5G enabled versus disabled

[Di46]

The case for a 5G device is primarily about longevity. 4G will remain supported for several years but 5G is the network technology being invested in. A phone bought in 2026 that you intend to keep for four or five years is better future-proofed with 5G than without

[Taker00]

In the UK 5G can be varied. Sometimes I'm in the middle of a shopping centre like the Trafford Centre and get no signal. Its proper cheugy