I just joined MangoLassi. Looking forward to participating.
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Best posts made by ILikeCarrots
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RE: What Are You Doing Right Now
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RE: Android device lockdown
Android tablets should be able to do this by default if they are relatively new.
https://www.howtogeek.com/170191/share-your-android-tablet-and-keep-your-privacy-with-a-guest-account/Look at the section that says "Restricted Profiles".