USB Tethering option (to share internet connection with PC) is greyed out [duplicate]

Question

Most probably these question+answer will be deleted as duplicates, so please do not vote here. But if the answer is useful - add your upvote here: https://android.stackexchange.com/a/252613/251126 in order to bubble a good (my hehe) answer there

For years I used my phone as a backup connection to the internet (and you know - airports...)

Today I connected my phone to the laptop with my factory-default cable and tried to enable tethering - but the USB Tethering button in the menu was disabled.

How to make it enabled?

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I checked the cable (several), and I use one that does the trick with another phone.

Recently I updated Android to v12

Answer 1

Most probably these question+answer will be deleted as duplicates, so please do not vote here. But if the answer is useful - add your upvote here: https://android.stackexchange.com/a/252613/251126 in order to bubble a good (my hehe) answer there

So it turned out that I needed to dance around the phone a little.

1 enable "Developer options"

In two words: Settings > About device > Version and here tap "Build number" several times.

Or google this: android YOURBRAND enable Developer options

2 reset default USB settings

Settings > System settings (at the bottom) > Developer options > Default USB configuration

I had "No data transfer" there, I changed it to "USB Tethering"

And also check the neighbor menu item Select USB configuration, my default value was "Charging", so I changed it to "RNDIS (USB Ethernet)"

Now disconnect-connect the cable, and it should work