TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System – 3 Pack
951/3024£119.99
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About this product
TP-Link Deco M4 guarantees a strong Wi-Fi signal in every corner of your home up to 4,000 square feet (3-pack). TP-Link Mesh means Deco units work together to form one unified network. Your phone or tablet automatically connects to the fastest Deco as you move through your home, creating a truly seamless Wi-Fi experience. Thanks to 802.11ac wireless technology, Deco M4 is capable of providing a lag-free connection to up to 100 devices. Manage your Wi-Fi at home or away in the Deco app. Pair with Alexa to control Deco M4 with voice commands.
Covers up to medium to large rooms with high performance mesh Wi-Fi, get rid of Wi-Fi boosters or extenders and keep 100+ devices connected at the same time. Control your home network using voice commands and more fun to use different apps and devices.
AC1200 Whole-Home Mesh Wi-Fi System, Qualcomm CPU, 867Mbps/5GHz+300Mbps/2.4GHz, 2 Gigabit Ports, MU-MIMO, Beamforming, Parental Controls, Access Point Mode, Deco App, Cloud Support, Alexa supported.
- Cable connection.
- 1 Power Port.
- LAN port: 2 (up to 2.5 GBPS).
- WAN port: 2 (up to 2 GBPS).
- USB port: no.
- Transfer speed up to AC1200Mbps.
- Weight 1.12kg.
- Size L9.07, W9.07, D19cm.
- Manufacturer's 3 year guarantee.
- EAN: 6935364085186.
4.7
264 reviews
95%
Recommended this product
Customers Say
Users are highly satisfied with the TP-Link Deco Mesh Wi-Fi system, praising its easy setup and reliable coverage throughout their homes. Many report significant improvements in Wi-Fi performance, even in challenging environments.
An AI generated summary based on recent customer reviews
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Worth it. No complaints.
I've had this over 6 months. The internet connection across the house has become more reliable and much faster. Areas that used to have low signal are as strong as right by the router and we can run multiple devices concurrently without issue whereas we couldn't do that before. Setting it up was tricky and required additional googling to get it working, once done though it's set and forget. App is fine to use. Performance is significantly better than a range extender.
Tw7654, 35 - 44
Coverage
Fantastic bit of kit . Was having trouble with dropping Wi-Fi getting through our walls …. Not anymore got full Wi-Fi through out
Jh89, 55 - 64
MR
It was good and ease to set up
STEVE, 65 or over
Great signal and fab product
Fab product works as expected
Katie
Great for extending wifi signal throughout house!
Bought this last year (July 2025) and very happy with the result. We now have wifi throughout the house, including upstairs, where before it was a very weak signal. Fairly straightforward to set up.
Mark Lythgoe, 65 or over, Penrith
Spot on product!
Totally cured my WiFi issues in a two bedroom terrace with thick walls. One on the lounge, one in bedroom and other in kitchen so made a good triangle of coverage including the back of the house. App useful too and no issues with PiHole either!
LeighP, 55 - 64, ST5
Pleasantly surprised.
I brought 6 of these to place around a large old farm house. Using two back haul wires and bouncing around the home from Deco to Deco, there isn't a spot that gets 90% of the top speeds available. The ping is impressive too. Setup is easy via the app. The network can also be accessed remotely.
Coco1211, 45 - 54
Wi-Fi issues resolved
This was so easy to set up and has resolved all the issues I had with poor WiFi signal even bought another unit for my hut the signal is so strong highly recommend
Geordie, 45 - 54, Northern Ireland
Easy to use and great price
I've not had much experience with mesh routers but I was pleasantly surprised how easy to setup they are. Also the range is really good also as I bought them to be able to have Internet in my workshop which is away from the house and it does!
RobertLee D, 45 - 54, Hampton in arden
Amazing boost to wifi
This has been a huge help with improving WiFi on the other side of the house.
KevinH, 25 - 34, Birkenhead
Hi,
The Deco M4 does not support network connectivity via SIM card; it requires an Ethernet cable connection to your broadband.
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Hello,
Our supplier has advised that the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System under ideal conditions, the maximum speeds of 2.4G WiFi and 5G WiFi are 867 Mbps and 300 Mbps respectively. So theoretically, the Deco M4 should be capable of handling the 500Mbps speed of the front-end router.
However, due to factors such as the wireless environment and client devices, the speed of Deco may be reduced. We are unable to determine the exact value.
Thank you for using Q&A
Hello There
After contacting our suppliers they have advised for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack.
A) All Deco units in a mesh network share the same SSID (network name), and by default, this includes both 2.4GHz and 5GHz bands. Directly separating these bands into different SSIDs is not supported. However, there is a workaround:
Open the Deco App and go to More > Wi-Fi Settings. Disable the 2.4GHz band for the main network.
Navigate to More > IoT Network, enable the IoT network, and set it to 2.4GHz only.
This setup results in a 5GHz-only main network and a 2.4GHz-only IoT network, ideal for devices that require specific band connections.
If your Deco model doesn’t support the IoT network feature, you can create a 2.4GHz-only Guest Network instead via More > Guest Network.
For Deco models supporting 6GHz Wi-Fi, the 6GHz network has a separate SSID by default. You can rename it to match the main network, but note that roaming on 6GHz operates independently.
B) Most Deco models allow you to set connection preferences for individual devices:
If a device connects to a distant Deco unit instead of the nearest one, you can set a preferred Deco for that device.
If high-speed devices (e.g., phones, laptops) connect to the 2.4GHz band instead of 5GHz/6GHz, you can set a preferred frequency for them.
If the “Connection Preferences” option isn’t available for a device, your Deco model may not support it. As an alternative, you can disable Mesh for that device to prevent roaming between Deco units.
C) Speed performance depends on several factors:
Your internet plan from the ISP.
The connection type between Deco units (wired vs. wireless).
Placement and distance between units, especially in a two-storey house.
In general, wirelessly connected secondary Deco units (especially the second and third ones) may experience reduced speeds due to signal degradation and interference. For optimal performance, placing Deco units strategically and using Ethernet backhaul where possible is recommended.
Thank you for using Q&A.
Hello There
After contacting our suppliers they have advised for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack.
No, you don’t need a separate router. The Deco M4 is fully capable of acting as your primary router. You only need an external modem (e.g. from your ISP) to connect to the internet.
You can optionally configure it in Access Point Mode if you want to keep or have your existing router with you already.
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Hello Neil D,
I can advise the following for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack:
Decos are only compatible with other decos.
Thanks for using Q & A.
Hello May,
The supplier has advised the following for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack:
Yes, Deco M4 is compatible with both BT and Trooli—just use it behind their router (unless you're using a DSL-specific Deco), disable the ISP Wi‑Fi, and run it in router or AP mode. A 3-pack should cover your 300 m² home fine, and no extra boosters are necessary unless you have stubborn zones.
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Hello Riley,
The supplier has advised the following for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack:
The TP-Link Deco M4 mesh Wi-Fi system can definitely help improve Wi-Fi coverage in your flat, but it’s important to understand what it can and can’t do regarding speed.
What Deco M4 Does Well: Fixes Wi-Fi Dead Zones. If your current router’s signal is weak in parts of your flat (even if the internet itself is OK), Deco M4 can greatly improve Wi-Fi signal and consistency by creating a mesh network across the flat.
Better Wi-Fi Coverage: Even in flats with thick walls or awkward layouts, Deco M4 spreads Wi-Fi better than most basic routers or extenders.
Stable Connections: It maintains a stable connection as you move around your home. (Important: It Won’t Increase Your Internet Plan’s Speed).
If the actual speed coming into your flat from your broadband provider (via the wall socket or router) is low, Deco M4 can’t boost that - it only distributes what you’re getting from the router. Example: If your broadband gives only 5 Mbps, Deco M4 will just spread that 5 Mbps around your flat. But if your Wi-Fi signal is poor (say you only get 2 Mbps in some rooms because of bad coverage), Deco M4 might help you get the full 5 Mbps everywhere.
Thank you for using Q&A.
Hi Lisa,
If this is the first time your devices connect to the new network, then yes, all devices wil need to be manually connect to the mesh network.
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Hello SP,
After checking with our supplier, they have advised for the TP-Link Deco M4 AC1200 Whole Home Mesh Wi-Fi System - 3 Pack: ''The TP-Link Deco M4 mesh system does advertise coverage of up to 4,000 sq. ft. (approximately 370 m²) with a 2-pack, but that’s total area, not the linear range from the first (main) Deco unit.
Estimated Real-World Range (Distance)
From the main Deco M4 unit connected via LAN to your modem/router:
*2.4 GHz band:
-Indoors: ~20–30 meters (65–100 ft)
-Line of sight: up to 50 meters (160 ft)
*5 GHz band:
-Indoors: ~10–20 meters (33–65 ft)
-Line of sight: up to 30 meters (100 ft)
How the Mesh Works
Each Deco unit connects to the next, passing the signal like a baton. The key distance is the spacing between Deco units:
*For optimal performance, Deco units should be placed no more than 10–15 meters (33–50 ft) apart, especially with walls or interference.
*Too far apart, and the second unit will get a weak signal—leading to slow speeds and instability.''
Thank you for using Q and A.
Hi Nick,
If you already have a router or hub installed, you can still integrate Deco into your network.
Tips for Setup:
1. Deco units cannot operate as Wi-Fi range extenders or repeaters to connect wirelessly to an existing router. However, if you have multiple Deco units, the satellite Deco units can connect to the main Deco wirelessly.
2. To prevent double NAT issues, it’s advisable to set Deco to Access Point Mode (AP mode). Router Mode is also an option if necessary.
3. While it’s recommended to use a different Wi-Fi name for Deco compared to your existing router, you can choose to use the same name if you prefer.
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The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.