I have lost my password to connect tablet

[OHUPARROT]

I have lost my password to connect to wi-fi

[CrimsonLiar]

Unless you've changed the router password it will be on a sticker either on the back, or the rear of the router.  Unless it's an Apple device you could even use the WPS button on the router to initiate connection (though this feature is best switched off).

[Jayach]

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@CrimsonLiar wrote:

Unless you've changed the router password it will be on a sticker either on the back, or the rear of the router.  

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On the THG3000, it's on the bottom of the foot, not the most obvious of places.

[Stumpy21]

If you are still needing help ? and have changed the default password and have a Windows device that is connecting automatically you can recover your WiFi password from that. Many free WiFi password viewing softwares are available.