In the context of Android devices, usually refers to manually installing a security certificate (like a root CA or SSL certificate) from a phone's storage.
If you are looking for specific government or banking certificates (like those for Gosuslugi or FNS ), you must first download the file from the official portal and then use the "Install from SD card" feature in your phone's settings. How to Install a Certificate from an SD Card fail sertifikata sd skachat
If you have already downloaded the .crt , .cer , or .p12 file to your device, follow these steps to install it: How to Install Certificates to Your Android Device In the context of Android devices, usually refers