This is probably the worst genius bar technical support I've experienced anywhere. First, a 30+ minute wait even if you have an appointment. Second, both technical staff didn't even try any steps before settling at "your device is too old, and you have to buy a new one." But there was a fix! You just didn't even try!
I came after an iOS update broke the wifi / giving trust certificate errors of our iPad (Safari no longer loading google.com, bing, yahoo, etc. and App Store longer can download), yet Apple tech can still connect to iPad to share screen. So, we know the Wi-Fi connection is working, but something else is amiss. My one ask to the staff is to make this work again without this certificate error. But no, staff saw the error, did some research in the back, brought out another staff and explained endlessly that because our iPad is old, there's no other way to fix this other than to purchase a new iPad. I asked again and again... Really? Is there really no other way? Makes no sense, cause iPad was working just fine a week ago until this update bricked and made this iPad useless. Both staff said no, unfortunate, it is what it is. Well, after some digging at home, Apple does have a real resolution, sharing here so the techs and people who search for this problem know how to fix this in the future. You have to reinstall Apple's root certificates.
1. Download the Apple Root Certificate
Open Safari on your iPad.
Go to https://www.apple.com/certificateauthority/
Find and download the Apple Root CA - G2 certificate (or the latest available Apple Root CA).
If the certificate doesn’t install automatically, continue to the next steps.
2. Manually Install the Certificate
Go to Settings > General > VPN & Device Management and check if the certificate is listed under "Downloaded Profile."
If it’s there, tap Install and confirm.
3. Trust the Certificate
Go to Settings > General > About > Certificate Trust Settings.
Find the newly installed Apple Root CA and toggle it to Trusted.
Restart your iPad to apply the changes. If it doesn't work, repeat the same steps with Apple Root CA - G3 certificate.
I get the incentive to nudge users to buy new devices, and I get it, our iPad is old as heck. But that doesn't mean you shouldn't even try! That's what genius bar is supposed to be for. Hope the technical staff can get better troubleshooting training, and not just default to "Sorry, you have to just buy a whole new iPad :/"