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I had this problem when my son got a Google play card for his birthday. It wouldn't allow him to add the balance to his account, only mine. So I did. And then I couldn't set the family payment method to anything but our credit card. I FINALLY figured out how to use his credit. He wanted Minecraft which I think is about 10 bucks. So I downloaded it to my ...


1

It seems that you're able to rename the device from Find My Device page. Log in with your child's account on a web browser and then modify the device name.


1

Just saw this workaround posted by a Stefan Brunnauer on Google Play Help, and it worked perfectly for me "Had the same problem - I removed the missmatching &gl=US query parameter at the end of the browser URL and it worked. Maybe this helps."


1

I used an incognito window to sign in and it worked. So maybe something to do with browser cache.


1

Update the software first, go on 'setting' then 'software update' Download and install.


1

Now accepted answer is obsolete. Now go to https://myaccount.google.com/personal-info then click "Choose what others see" then you are on "About me" page and in section "Basic info" next to the name is arrow, click it and there you can enter nickname. But nickname can not be used standalone but only combined with name and ...


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