WiFi and network speed test

When to test the network

Test it when you look at a used device, when it gets weaker Wi-Fi than other devices in the same room, and after a screen, housing or board repair (the antennas sit close to the frame and are easily disturbed). The clearest test is a side-by-side comparison: same Wi-Fi, same spot, run the test on both devices at the same time.

Common faults and their causes

• Much slower than another device in the same spot: a loose or broken antenna cable after a repair, or a device that only supports older Wi-Fi standards and the 2.4 GHz band.
• Speed swinging wildly, frequent drop-outs: a weak signal, a crowded network, or a laptop network card on its way out.
• High ping: usually the network or the distance to the router, rarely the device.

Results depend on your plan and router, so a single number doesn't say whether a device is good or bad. The test downloads sample data from Cloudflare's servers and sends none of your personal data.

What to do if you find a fault

• Stand near the router, turn off any VPN and data saver, and run it a few times.
• Try mobile data too: make a call and compare the signal bars with another phone on the same carrier.
• Much weaker signal right after a repair: ask the shop to check the antenna cables. See checking a device after a repair.