Certificates and lokmat 4

Hello, I will try to explain it simply in my best English. I have a lokmat 4 smartwatch and I want to install a certificate to have WiFi everywhere. My provider offers this. I also did this on my mobile phone. When I go outside, I can have internet everywhere because I then automatically log in to other people’s routers.
To install this certificate I used steps that are on the website of my provider. I also have this certificate for my smartwatch, but have not yet found the right way to install this on my watch. This certificate must be installed via settings.You can’t just click on it to install. I would like to use this option again.
Now my question: is there a possibility to install cerifikates correctly on my lokmat 4.