If a colleague at work wants my phone for an emergency call and I don't want him to take a peek at my call logs or SMS or photos. Is there a guest mode in Windows 10 Mobile for a scenario like this to protect my privacy? If it is there, how can I activate it?
My phone is Lumia 640 XL using Windows 10 Mobile
There is no guest account in Windows mobile. But you can use Kids corner or apps corner in Windows mobile. This will give allow someone to use your phone but only the apps you allow.
Here is what Microsoft says about Apps corner
Apps Corner lets you set up a custom Start screen on your Windows Phone 8.1, where you can share only the apps you choose with the people you let use your phone.
Microsoft explains about kids corner in this article as follows,
No such worries with Kid's Corner, a place on your phone where your child can play with the games, apps, music, and videos you add there, but can't get to the rest of your stuff.
You can find the difference about Apps corner and Kids corner in this answer in Windowsphone SE site.
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