WiFi "Speed" is Slow on 2.4GHz but Fast on 5GHz

4.5

Your old laptop is slow, but your new phone is fast on the same WiFi network.

Symptoms
  • Slow legacy devices
  • Fast modern devices
  • Interference
Possible Causes
  • 2.4GHz congestion
  • Bluetooth interference
  • Older WiFi standards (802.11n)

Step-by-Step Fix

1

Change 2.4GHz Channel Width

Set it to 20MHz instead of 40MHz to reduce interference.

2

Disable Bluetooth

Bluetooth and 2.4GHz WiFi fight for the same airwaves.

3

Upgrade the Device

If a device doesn't support 5GHz, it will always be slower in a crowded area.

When to See a Technician

2.4GHz is like a single-lane road with lots of traffic; 5GHz is a multi-lane highway.

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