Why 5G often feels exactly like 4G

This looks at mobile network generations from the practical end — what holds up once conditions stop being ideal.

One name, three very different radios

Low-band 5G occupies frequencies close to those long used for 4G, reaching many kilometres and through buildings, with capacity to match. Mid-band sits higher, offering substantially more capacity over a range of hundreds of metres to a few kilometres.

High-band, often called millimetre wave, offers enormous capacity over a range measured in hundreds of metres with almost no penetration through walls. A phone showing a 5G indicator gives no information about which of these it is using, which is the root of most disappointment.

Bandwidth is set by spectrum, not by generation

Data rate scales with how much contiguous spectrum a carrier holds and how efficiently it can be modulated. The efficiency improvement between generations is real but modest; the large gains come from having far more spectrum available at higher frequencies.

This is why a carrier with a wide mid-band allocation delivers dramatically better 5G than one without, on identical handsets. Spectrum allocation is a regulatory and auction outcome, which is why performance varies so much between countries.

Higher frequency, shorter reach

Radio waves lose energy passing through material, and the loss rises steeply with frequency. Millimetre wave signals are attenuated by walls, foliage, rain and in some cases a hand placed over the antenna. Covering an area therefore requires far more transmitters, which is a civil engineering and site rental problem more than a radio one.

That economic reality, not any technical failure, is why high-band deployment is concentrated in stadiums, stations and dense city cores.

Latency improved less than promised

The radio interface genuinely reduces the time to get a packet onto and off the air, which is a real gain of several milliseconds. The rest of the path — backhaul, core network, internet routing and the distance to the server — was unchanged. The very low figures quoted in early marketing assumed edge computing that places servers close to the tower, which has been deployed sparsely.

A ping to a distant server is still governed by distance, as it always was.

Standalone versus the transitional version

Early deployments used a 5G radio attached to an existing 4G core network, which limited the features that could be offered. A standalone deployment replaces the core as well, enabling network slicing, lower latency and better support for very large numbers of low-power devices. The transition has been gradual and uneven, so two carriers advertising 5G may be running architecturally different networks.

At the protocol level, handset support for the standalone mode has also varied by model and region.

Implementations differ, and vendors are not obliged to document the differences.

What actually improves your experience

Coverage of a mid-band layer where you spend time matters far more than any generation label. Network congestion at busy times is a capacity problem that more spectrum solves and a newer phone does not.

The short version: signal indicators showing bars are a poor guide; the underlying measurements of signal strength and quality are available in most phones under diagnostic settings. Where indoor coverage is poor, a fixed connection with local Wi-Fi and calling over Wi-Fi remains the better answer.

The takeaway

Ask which band, not which generation. That is where all the difference lives.

The constraint is almost always physical, and marketing rarely mentions which one.