Fiber vs. Cable vs. DSL vs. 5G Home – What Actually Delivers in 2026

Four broadband technologies compete for your home: fiber-to-the-home (FTTH), cable (DOCSIS 3.1), VDSL, and 5G fixed wireless. Each looks great on paper. Each has very different real-world behavior. Here's what to actually expect.

The short version

Tech	Plan	Real median	Latency	Symmetric?
FTTH (fiber to home)	1 Gbps	900–960 Mbps	3–6 ms	Yes
Cable (DOCSIS 3.1)	1 Gbps	650–850 Mbps	15–30 ms	No (35 Mbps up)
VDSL / G.fast	250 Mbps	180–220 Mbps	10–20 ms	No (40 Mbps up)
5G fixed wireless	500 Mbps	80–400 Mbps, highly variable	20–50 ms	No

1. FTTH — actual fiber into the apartment

The cable is glass all the way to your unit. No copper, no signal loss. 1 Gbps symmetric is realistic, latency stays below 5 ms. Providers vary by country: Verizon Fios, AT&T Fiber, Frontier Fiber, Google Fiber, Ziply (US); BT Full Fibre, Hyperoptic (UK); Deutsche Glasfaser, Telekom FTTH (DE); Free, Orange, SFR (FR).

Watch out: the word "fiber" is used loosely. FTTN, FTTC, FTTB still have copper for the last segment. Real FTTH is sometimes called FTTU or FTTP. Ask explicitly.

2. Cable (DOCSIS 3.1)

Comcast Xfinity, Spectrum, Cox, Virgin Media. Up to 1 Gbps down — but upload caps at 35–50 Mbps, latency runs higher, and at peak hours (7–11 PM) your local segment is shared with the neighborhood. When the street is busy, 1000 Mbps can drop to 200.

Great for streaming and browsing, noticeably worse than fiber for video calls, cloud backup, and large uploads.

3. VDSL / G.fast

BT, Sky, TalkTalk in the UK; CenturyLink/Frontier copper in the US; Deutsche Telekom MagentaZuhause in DE. Up to 250 Mbps in theory. Real numbers depend heavily on cable distance from the cabinet: directly at the DSLAM you get 230 Mbps; 800 m away you get 100. Always run an availability check with multiple providers before signing.

4. 5G as a fixed-wireless home option

T-Mobile Home Internet, Verizon 5G Home, Three 5G Hub. Useful where fiber and good cable aren't available, but: data caps sometimes apply, latency is jittery, and in dense cities the cell is overloaded at peak hours. Treat it as a bridge, not a destination.

Is the fiber upgrade worth it?

For most households: yes, as soon as it's available. Four concrete reasons:

Symmetric upload — vital for cloud, video calls, streaming creators
Low latency — noticeable in gaming and conference calls
Stability — no time-of-day collapse like on cable
Future-proof — 10 Gbps is technically possible without changing the line

FAQ

Is 50 Mbps enough for a family of four?

Tight. Netflix + school + remote work simultaneously will stutter. Two 4K streams in parallel break it. 100–250 Mbps is the sensible 2026 floor.

Why does cable have so little upload?

DOCSIS is asymmetric by design — the spectrum allocated to upload is limited. DOCSIS 4.0 fixes this, but rollout is still slow.

I have fiber but speeds are bad — what now?

Test with an Ethernet cable directly into the fiber ONT. If still well below plan, that's evidence for a service ticket and a refund/credit claim.

Measure what your line actually delivers.
→ Run the speed test