TP-Link Archer T4U Wi-Fi Dongle Review UK 2026

Spending money on the wrong Wi-Fi adapter means dealing with dropped connections and wasted cash. I’ve tested the TP-Link Archer T4U over three weeks to tell you whether it’s worth your time, or if you should look elsewhere.

Where it shows its age is efficiency. Wi-Fi 6 adapters handle congestion better, manage multiple devices more gracefully, and offer lower latency. The T4U doesn’t have mimo" class="vae-glossary-link" data-term="mu-mimo">MU-MIMO (multi-user, multiple input, multiple output), so it can’t communicate with your router as efficiently as newer tech. For solo desktop use? Not a huge deal. But it’s worth knowing what you’re missing.

Look, I’m not expecting premium features at this price. But the lack of an adjustable antenna is a bit annoying. If your router’s in another room or behind obstacles, you can’t angle the adapter for better reception. You’re stuck with whatever signal the fixed internals can grab. Competitors like the ASUS USB-AC56 offer flip-up antennas that make a real difference in marginal signal situations.

I tested the T4U against my usual benchmark setup: a Wi-Fi 6 router in the living room, desktop in the back bedroom, with typical household obstacles (walls, furniture, the neighbour’s competing networks). Close-range performance was fine, over 400Mbps on the 5GHz band is plenty for streaming, video calls, and downloading games.

But. And there’s always a but. Performance degraded faster than I’d like once I moved beyond line-of-sight. At 10 metres with one brick wall in the way, speeds dropped to around 187Mbps. Still usable, but Wi-Fi 6 adapters I’ve tested maintain 250-300Mbps in the same scenario. The fixed antenna design doesn’t help here.

Gaming latency was acceptable for casual play, 18-24ms to most UK servers. That’s fine for single-player or cooperative games. If you’re into competitive shooters or fighting games where every millisecond counts, you’ll want either Ethernet or a better wireless solution. The T4U isn’t optimised for low-latency performance.

The plastic housing feels a bit cheap compared to adapters with rubberised or metal finishes. Not a huge concern since it’ll spend its life plugged into the back of your PC, but worth noting. I’ve been using it daily for three weeks with no issues, but I wouldn’t fancy its chances if you dropped it on a hard floor.

One practical annoyance: the size blocks adjacent USB ports on some motherboards. It’s not massive, but it’s chunky enough that you might need to use a USB extension cable if your rear I/O is tightly packed. TP-Link doesn’t include one in the box, which is a bit stingy.

Daily use has been solid. The adapter reconnects automatically when I boot the PC, switches bands when appropriate, and hasn’t dropped connection once in three weeks. That’s the baseline expectation, sure, but plenty of budget adapters fail this basic test. The T4U passes.

The included TP-Link utility software is… fine. It’s a dated-looking Windows app that shows connection speed, signal strength, and lets you manually switch bands. Honestly, I’ve just been using Windows’ native Wi-Fi management, which does everything I need. The utility isn’t bad, it’s just unnecessary for most users.

Against the ASUS USB-AC56, the T4U loses on features (no adjustable antenna) but wins on price. The ASUS is about £15-20 more expensive, which buys you better range performance and the ability to position the antenna for optimal signal. If your router’s far away or in a dodgy location, the ASUS is worth the extra outlay. If your router’s close and you just need basic connectivity, the T4U suffices.

Personally? I’d spend the extra fiver for the TX20U Plus. Wi-Fi 6 is the current standard, and even if your router doesn’t support it yet, you’re buying future compatibility. The T4U feels like buying yesterday’s technology at today’s prices.

Here’s my honest take on value: the T4U does what it claims. It’s a functional AC1300 adapter that’ll connect your desktop to Wi-Fi without hassle. But the value proposition falls apart when you look at the competition.

For £3-5 more, you get Wi-Fi 6 adapters with better performance, improved efficiency, and compatibility with current-generation routers. The T4U only makes financial sense if you’ve got an older Wi-Fi 5 router and absolutely no plans to upgrade, in which case, sure, you’re not paying for features you can’t use.

For everyone else? The small price premium for Wi-Fi 6 is worth it. You’re buying compatibility with routers you’ll encounter for the next 3-5 years, better performance in congested environments, and lower latency. The T4U is yesterday’s technology at a price that doesn’t adequately reflect its age.