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How to Fix a Crappy Comcast Wifi Connection

Do a WiFi Speed Test

Before you start changing your WiFi router’s setting or upgrading your hardware, you should do a quick speed test to see how fast your WiFi really is. You can easily do this on your computer or smartphone by going to and clicking Go.

Once you have your speed test results, compare them to the maximum speeds advertised in your internet plan. If your download and upload speeds are significantly lower than what you are paying for, there might be something slowing down your WiFi.  

Read More: How to do a WiFi speed test and what the results mean

Use a WiFi Repeater or Extender

(Image Source: Amazon)
(Image Source: Amazon)

If you have any WiFi “dead zones” in your home, you can use a WiFi repeater or extender to bring the internet to you. Both of these devices use your existing WiFi network to boost your WiFi signal range, but they can also cause your WiFi speeds to slow down.  

A WiFi repeater connects to your existing WiFi network wirelessly and re-broadcasts that signal. However, a WiFi repeater needs to receive a strong WiFi signal, so the farther it is from your router, the weaker your signal will be.

A WiFi extender, on the other hand, connects directly to your home network through a wired connection. Then it creates a new WiFi network, which means you will have to change WiFi networks as you move around your home.

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Tips for reducing interference from other wireless devices

The first place to start is by making sure your router is being interfered from other wireless devices. If you have other devices in the area that broadcast a strong signal, these can wreak havoc on your home WiFi. Consider investing in an inexpensive device called a WiFi extender to help reduce interference from other devices.

A WiFi extender is easy to install and will help boost your home’s WiFi signal. You simply plug the extender into an electrical outlet then connect it to your router with an ethernet cable.

These devices work by boosting the weak signals coming from your devices and transmitting them through walls, bridging the connection between them without any interruption of quality or data rate.

Once you have an extension, you can plug it at any point in your house – even outside on the porch if you want an extended WiFi reach.

1. Select a Good Place for Your Router

Not all places are equally suitable for your router. To start with, you want to avoid placing your router close to metal objects and appliances that emit electromagnetic waves. Metal is the top disrupter of a WiFi signal, and its presence close to a WiFi router can easily create a large dead zone.

Other materials, including glass, wood, plastics, foam, and cardboard, can also disrupt a WiFi signal but their influence of WiFi signal strength tends to less severe. Keep in mind that many buildings use metal studs (rather than 2×4 wood) for the particle board mounting, and placing your router close to them would be a bad idea. When in doubt, use a handheld stud finder or at least a stud finder app on your smartphone.

Strictly speaking, all household appliances emit electromagnetic waves to some degree, even fluorescent lightbulbs, circuit breakers, and electric razors. The biggest emitters of electromagnetic waves tend to be found in the kitchen, and they include stoves, microwave ovens, and dishwashers.

Other problematic appliances are washing machines, tumble dryers, televisions, cordless phones, and radiant heaters. If you have any of these appliances at home, keep your WiFi router as far away from them as possible to boost WiFi signal.

What WiFi extender is the best?

Top 5 Best Wireless Extenders
  • #1. D-Link DAP-1650 WiFi Range Extender (AC1200)
  • #2. Linksys RE7000 Max-Stream AC1900+ WiFi Range Extender.
  • #3. Netgear Nighthawk X4 AC2200 WiFi Range Extender (EX7300)
  • #4. TP-Link AC1750 WiFi Range Extender (RE450)
  • #5. Linksys AC1200 Max WiFi Range Extender RE6500.

What is WiFi mesh?

Xfinity xFi lets you manage your home WiFi network and connected home. You can self-install and set up your WiFi environment in minutes, find your WiFi password, know who’s online, troubleshoot issues and manage family members’ online experiences with features like Pause and Parental Controls.

2. Update Your Router Firmware

Before you start tweaking things, it’s a good idea to update your router. Router manufacturers are always improving software to eke out a bit more speed. How easy—or how hard—it is to upgrade your firmware depends entirely on your device’s manufacturer and model.

Most current routers have the update process built right into the administration interface, so it’s just a matter of hitting a firmware upgrade button. Other models, particularly if they’re older, still require you to visit the manufacturer’s website, download a firmware file from your router’s support page, and upload it to the administration interface. It’s tedious, but still a good thing to do since it would be such a simple fix.

In fact, even if your wireless network isn’t ailing, you should make it a point to update your firmware on a regular basis for performance improvements, better features, and security updates. For help with this, we have a guide on accessing your router’s settings.

If you really want to get the most out of your current router, the adventurous should look at a third-party firmware, like the open-source DD-WRT. This can ramp up performance and give you access to more advanced networking features, including the ability to install a virtual private network (VPN) right onto your router. It’s a bit more complex to set up, but for tech-savvy users, it may be worthwhile.

13. Change Your DNS Address

The Domain Name System (DNS) is responsible for converting domain names (such as www.google.com) into IP addresses ( By default, your modem is most likely configured to use your internet service provider’s DNS server, whose performance may not be the best.

The good news is that most modems let you change your DNS address, which is often the easiest way how to boost WiFi performance. There are many public DNS servers you can choose from, including Google’s DNS server ( or Cloudflare’s DNS server (


Once your settings are tweaked, you can save them and I recommend rebooting your router. In some cases, each change you make is automatically saved and you have no need to reboot. I strongly suggest rebooting in any case if the settings were automatically saved for you. You can simply unplug the router and then plug it back in, or in some firmware setup screens inside a router you have the reboot option. Once the router is back up and running, connect to your brand new (and hopefully well functioning) network and start running speed tests. Walk to various points in your environment (floor to floor, room to room) running your ISPs speed test like Xfinity Speed Test that Comcast makes available on the Internet for each and every room. You may need to tweak settings further if performance is below your expectations.

9. Upgrade Your Obsolete Hardware

  TP-Link Archer AX11000 tri-band gaming router  TP-Link Archer AX11000 tri-band gaming router

It’s a good idea to get the most out of your existing equipment, but if you’re running old hardware, you can’t expect the best performance. We have a tendency to subscribe to the “if it ain’t broke, don’t fix it” mentality with back-end devices, especially networking gear. However, if you bought your router years ago, you might still be using the older, slower 802.11n standard (or God forbid, 802.11g).

Older routers may cap at fairly low bandwidths, and may even have shorter ranges. Thus, all the tweaking we’ve outlined above will only get you so far—the maximum throughput for 802.11g is 54Mbps, while 802.11n caps out at 300Mbps. The latest 802.11ac supports 1Gbps, while next-gen Wi-Fi 6 routers can theoretically hit 10Gbps. Our list of the best wireless routers is a good place to start the search for a faster router.

Even if your router is new, you might have some ancient devices that are falling back to older, slower standards. If you bought a PC within the last couple of years, you likely have an 802.11ac wireless adapter, or at least 802.11n. But the older your devices, the less likely they are to have modern tech built in. (You might be able to buy a USB Wi-Fi adapter that makes things a bit better on those old machines, though.)

Remember, a higher-quality router won’t just support those faster standards—it’ll also do all the things we’ve outlined above better. It’ll have better channel selection, perform better band steering for 5GHz devices, and include better QoS features.

Others may have features like Multi User-Multiple Input Multiple Output (MU-MIMO), like the Editors’ Choice TP-Link Archer AX11000 tri-band gaming router. MU-MIMO routers can send and receive multiple data streams simultaneously to multiple devices without bandwidth degradation and require specialized testing with multiple clients, but the clients need to be MU-MIMO compatible.

If you do end up buying a new router, the setup process won’t be too scary. We have a guide on how to set up and configure the device.

↓ 04 Wireless Mouse, Keyboards, Speakers, And Printers

Wireless Mouse, Wireless Speakers, Wireless Keyboards, Wireless Headphones and more can interfere with your wifi signals, if possible, use a wired mouse and keyboards. I experienced this when I purchased a new computer with both wireless mouse and keyboard, initially I thought it was weak batteries or product defect. The problem goes away when I research the channel frequency my Logitech devices use and change the channel for my router, thus avoiding any conflict due to proximity. Yes, I am aware that those are powered by Bluetooth, but the extra noise generated by so many devices on the same channel causes a slow response from the device and high latency.

Wireless boosters and extenders

If you’re struggling with a weak signal, try investing in a wireless booster and extender. These devices can be plugged into an outlet in your house for optimal WiFi coverage.

Some booster extenders come with multiple ports, so you can plug them into one outlet and find the perfect spot to place them.

You might even be able to place the device on a higher level like a second floor to get better reception.

Upgrade your WiFi router’s firmware

Firmware is software that makes your devices work the way the manufacturer intended them to. Some devices, such as routers, need to have their firmware upgraded periodically to make sure they are functioning to the best of their ability. To make sure your router has the most up-to-date firmware installed, you should consult your user documentation, the router manufacturer or your internet provider. You might need to download a firmware file from your router’s support page or push a firmware upgrade button on your router. Upgrading router firmware should be done fairly regularly to improve your WiFi signal whether you are having problems or not.

4th Step…Ready to start configuration? Not quite yet

You want to check for updated firmware for your new WiFi router. Who knows how long it sat on the store shelf, and how many updates came out since the model was released. How to update the firmware on your router will vary by manufacturer and model. Some will simply prompt you about updates once you login. Others are not nearly as straight forward. You will need to investigate how to do it. The quick start guide that came with your new WiFi router should also have the initial login information for the username and password.

How to boost Wi-Fi signal on a router without antenna

The first thing you need to do is to ensure your router firmware is up to date. If the router is still running an outdated firmware version, you need to update it to the latest version to avoid weak signals.

It is also advisable to make use of Wi-Fi extenders to boost the Wi-Fi strength on your router. Here are the steps to boost your Wi-Fi signal with an extender using the Wi-Fi-protected setup.

  • Place the extender next to your router within range.
  • Find the WPS button on the extender and press it continuously for at least 5 seconds.
  • This will prompt the Wi-Fi light on the extender to start blinking. Wait for 2 minutes.
  • Press the WPS button on the router and wait for another 2 minutes.
  • Once the extender is successfully connected to the network, the blinking light will turn solid.

It takes at least 2 minutes for the extender to establish a connection with the router. If the setup fails, try repeating the procedure.

Once the connection is complete, you can use the extender to connect to your network. You still use the same Wi-Fi password on your router to connect to the extender.

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We are always very keen to get feedback from the audience and like to answer the doubts and queries

↓ 02 DIY WiFi Antenna Reception Booster

How to improve your internet connection and wifi signal strength? If your laptop doesn’t use an intel wireless chipset, the only way to solve this is to purchase a USB wireless adapter. After researching for days, I could not find any Intel powered Wireless USB Adapter, I suspect this is because the cost is too high or not a favorite among geeks. After all, the best USB Wireless Network Adapter that can be hacked for stealing wifi packets efficiently are powered by Atheros, Ralink, and Realtek Chipsets. With that, you will need to purchase a USB Wireless Network Adapter, download the WindSurfer A4 Size Template and create your own antenna extender.


  • Boosting your router’s signal without following your country’s procedure regarding wireless signals can result in a fee. Check your area’s legislature to make sure what you’re doing is legal.

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Get a WiFi range extender or a repeater

One way of improving the WiFi signal around your home is to use a wireless extender or a repeater. Extenders and repeaters look like routers, but act a bit differently: they pick up the WiFi signal from your router, amplify it and re-broadcast it from a different position in your home.