This article shows you the steps on how to install the new root certificate – ISRG Root X1 – on your iPhone iOS.
1. Download the certificate from this link: http://vo.agnx.com/isrgrootx1.der
2. Click on [ Allow ].
3. Then, click on [ Close ] once the profile had been downloaded.
4. Next, go to you iPhone Settings.
5. Select Profile Downloaded.
6. Click on [ Install ] to install the profile.
7. Enter your iPhone passcode.
8.Click on [ Install ].
9. Once again, select [ Install ]
10. Lastly, once the profile had been installed, click on [ DOne ].