Why Am I Getting 50Mbps WiFi Download Speeds After Upgrading to 150Mbps Internet Plan?

Many users experience slower-than-expected WiFi download speeds after upgrading to a higher bandwidth plan, such as moving from 50Mbps to 150Mbps. If you are currently using Comcast Internet with a Netgear Nighthawk AC1750 router and an ARRIS SURFboard SB6190 cable modem, here are several reasons and solutions to consider.

Router Placement and Interference

Location: Ensure that your router is centrally located in your home, away from walls and obstructions. This can significantly improve the signal strength and coverage within your house.

Interference: Other electronic devices, such as microwaves and other WiFi networks, can interfere with your signal. Try changing the channel on your router to a less congested frequency. If you are using a dual-band router like the Netgear Nighthawk AC1750, prioritizing the 5GHz band can also help since it offers faster speeds but has a shorter range.

WiFi Band

2.4GHz vs. 5GHz: The Netgear Nighthawk AC1750 operates on both 2.4GHz and 5GHz bands. While the 2.4GHz band covers a larger area, it is slower and more prone to interference. The 5GHz band, on the other hand, offers faster speeds but has a shorter range. If you are using a device that supports the 5GHz band, connect it to this band for better speeds.

Device Limitations

Hardware Limitations: The device you are using may not support higher speeds. Check if your devices WiFi adapter supports speeds above 50Mbps. If not, upgrading your hardware can significantly improve your WiFi performance.

Background Applications: Background processes or applications using bandwidth can also slow down your connection. Close any unnecessary applications and background processes to free up bandwidth for your primary tasks.

Network Congestion

If multiple devices are connected to your network and using bandwidth simultaneously, this can slow down your connection. Try disconnecting other devices and see if your speeds improve.

ISP Throttling

Some internet service providers (ISPs) may throttle speeds during peak usage times. Contact Comcast to inquire if there are any issues or throttling affecting your account.

Firmware Updates

Ensure that both your router and modem firmware are up to date. Manufacturers often release updates that can improve performance and security. This can help resolve any bugs or software issues that might be affecting your WiFi speeds.

Wired vs. Wireless Testing

To determine if the issue is with the WiFi network or the internet connection itself, test your internet speed using a wired connection, such as an Ethernet cable directly connected to the modem. This will help you identify if the problem lies with your WiFi setup or the internet connection as a whole.

Quality of Service (QoS) Settings

Check your router's QoS settings. Misconfigured QoS can limit bandwidth for certain devices or applications, leading to slower speeds. Ensure that these settings are configured correctly to prioritize your primary tasks without affecting other devices.

Modem Compatibility

The ARRIS SURFboard SB6190 is generally compatible with 150Mbps plans. Ensure that it is properly configured and functioning. If you have any doubts, consult the user manual or Comcast support for guidance.

Troubleshooting Steps

Restart your modem and router to reset any temporary issues. Check for firmware updates on both devices. Test speeds with a wired connection to narrow down the problem. Optimize router settings and placement to improve signal strength. Contact Comcast for assistance if issues persist.

By systematically checking these factors, you should be able to identify the cause of your slower WiFi speeds and work towards a solution. Remember that a combination of hardware, software, and network configuration factors can affect your WiFi performance, so addressing multiple areas of potential issues can yield the best results.