Internet Speed Tests: 5G Cellular vs Cable vs Fiber Compared

The average American household now uses over 500 GB of data per month — and that number keeps climbing. Yet millions of people still settle for sluggish connections simply because they don't know what's actually available to them, or they assume their only options are whatever the local cable company is selling. A speed test can be a wake-up call. Understanding what those numbers actually mean — and how different technologies stack up against each other — is how you start making smarter decisions about your home internet.

Let's break down the real-world performance of three of the most common internet technologies: 5G cellular internet, cable, and fiber. No jargon overload, no sales pitch — just honest comparisons backed by data.

What a Speed Test Actually Measures

Before comparing technologies, it helps to understand what speed tests are actually capturing. When you run a test on Speedtest.net, Fast.com, or Google's built-in tool, you're measuring three things:

• Download speed — How fast data travels from the internet to your device (measured in Mbps or Gbps)
• Upload speed — How fast data travels from your device to the internet
• Latency (ping) — The time it takes for a signal to travel from your device to a server and back, measured in milliseconds (ms)

All three numbers matter. Download speed handles streaming and browsing. Upload speed affects video calls and gaming. Latency determines how responsive your connection feels — a crucial factor for gaming, virtual meetings, and anything real-time.

Cable Internet: The Old Reliable

Cable internet runs over the same coaxial infrastructure originally built for television. It's widely available in suburban and urban areas, and for years, it was the default "good enough" option for most households.

Typical speeds:

• Download: 100–1,000 Mbps
• Upload: 10–50 Mbps (often much lower than download)
• Latency: 15–35 ms

Cable's biggest weakness is its asymmetric speed structure. You'll get decent downloads, but uploads have traditionally lagged far behind — a real problem in an era of remote work and video conferencing. Cable networks are also shared infrastructure, which means your speeds can drop during peak hours when your neighbors are all streaming simultaneously.

DOCSIS 3.1, the latest cable standard, has improved things considerably, but rollout is uneven. You might live a mile from someone on the same provider getting dramatically different speeds.

Fiber Internet: The Gold Standard

Fiber-optic internet transmits data as pulses of light through glass or plastic cables. It's the fastest and most reliable residential internet technology available — but it's not available everywhere.

Typical speeds:

• Download: 300 Mbps–2 Gbps+
• Upload: 300 Mbps–2 Gbps+ (symmetrical)
• Latency: 5–15 ms

Fiber's advantages are hard to argue with: symmetrical speeds, low latency, and virtually no congestion issues. For households with heavy internet usage — multiple 4K streams, cloud backups, frequent video calls — fiber is the clear winner on paper.

The catch? Fiber reaches only about 43% of U.S. locations, according to the FCC. Laying new fiber infrastructure is expensive, and providers have little financial incentive to build it out in low-density rural areas. If you're outside a major metro, fiber may simply not be an option.

5G Cellular Internet: The Fast-Moving Challenger

5G home internet is the newest major player, and it's been changing the conversation — especially for rural and suburban households that cable companies have underserved for decades.

Typical speeds:

• Download: 100–1,000 Mbps (varies by band and location)
• Upload: 20–100 Mbps
• Latency: 20–40 ms on sub-6 GHz; as low as 10 ms on mmWave

5G internet uses the same cellular network infrastructure as your smartphone but delivers it to a home router via a fixed wireless connection. No cables to run, no technician visit required — in many cases, you plug in a device and you're connected.

The performance picture is nuanced. Speed varies based on which 5G band is in use:

1. mmWave (millimeter wave): Extremely fast — sometimes exceeding 1 Gbps — but short range and limited to dense urban areas
2. Mid-band (C-band, 2.5 GHz): The sweet spot — strong speeds over wider coverage areas, increasingly common
3. Low-band (sub-6 GHz): Widest coverage, including rural areas, but more moderate speeds similar to solid cable performance

For rural internet access specifically, 5G cellular internet has been a game-changer. Where cable never reached and fiber won't reach for years, 5G towers are already operating. Services like those offered by WIFI-FOMO (https://wififomo.com) are making reliable wireless internet a practical reality for households that have spent years dealing with satellite delays or unreliable DSL.

Head-to-Head Comparison: What the Numbers Tell Us

How to Run a Meaningful Speed Test

A single speed test snapshot doesn't tell the whole story. Here's how to get a more accurate picture of your connection:

1. Test at different times — Run tests in the morning, afternoon, and evening (especially 7–10 PM, when networks are typically most congested)
2. Use a wired connection — Plug directly into your router with an Ethernet cable to eliminate Wi-Fi as a variable
3. Close background apps — Streaming services, cloud backups, and software updates all consume bandwidth during tests
4. Test multiple servers — Use Speedtest.net and pick servers in different cities to get a broader picture
5. Check latency, not just speed — A 300 Mbps connection with 80 ms latency will feel worse for gaming or video calls than a 100 Mbps connection at 20 ms

What Speed Do You Actually Need?

Netflix's 4K streaming requires about 25 Mbps per stream. A video call on Zoom uses 3–5 Mbps each way. Online gaming needs less raw speed but is extremely sensitive to latency. A household with two remote workers, two kids gaming, and a couple of streaming devices probably needs at least 200–300 Mbps of reliable download speed — with decent upload to match.

The emphasis is on reliable. A plan that advertises 500 Mbps but delivers 60 Mbps during peak hours is worse than a consistent 150 Mbps connection. This is where 5G home internet has been gaining ground — not by being the fastest on paper, but by delivering more consistent performance without the shared-network slowdowns common to cable.

The Bottom Line

Fiber wins on raw specs when it's available. Cable remains a workable option in well-served areas. And 5G cellular internet has moved from "interesting alternative" to a genuinely competitive home internet solution — particularly for the tens of millions of Americans in rural and underserved communities where other options simply don't exist.

The best internet connection isn't necessarily the fastest one — it's the most reliable one you can actually get where you live. Run the tests, check what's available in your area, and don't assume you're stuck with whatever you've always had. The landscape has changed faster than most people realize.

About the Author: Alex Monroe writes for WIFI-FOMO (https://wififomo.com), a 5G cellular internet service provider delivering fast, reliable home internet to rural and underserved communities across the country.

Originally published at WIFI-FOMO