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The number displayed to the left of the Wi-Fi icon differs according to the Wi-Fi standard of the current connection.
Please see below information for the number appears next to the Wi-Fi icon.
- No. 4 is Wi-Fi 4, which is 802.11n technology.
- No. 5 is Wi-Fi 5, which is 802.11ac technology.
- No. 6 is Wi-Fi 6, which is 802.11ax technology.