Please note that your ActivConnect needs to be connected via Ethernet in order for Internet to be enabled, which in turn allows access to the Wi-Fi hotspot settings.

Tap the setting icon in the bottom left corner.
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Tap the gear icon.
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Tap Settings.

Select More from the Wireless & networks section.
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Select Tethering & portable hotspot.
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Select Set up Wi-Fi hotspot.
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Enter your Network name and Password and click Save.
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Ensure that Portable Wi-Fi hotspot is enabled.