How to delete the profile: Follow the instructions on the Apple website.
1. Turn on Wifi and go to Settings → Wifi.
2. Choose Sincoolka network.
3. Enter your SINIS login email and password.
4. It is likely that you will be required to verify the server certificate. Check that the server name is radius.sin.cvut.cz and it is signed by ISRG Root X1 / Let's Encrypt R3 (you may also check the certificate thumbprint at Certificates page), then tap Connect.
5. You might also need to Turn Private Address off for iPhone, iPad or iPod touch for our networks.