About a year ago, I changed my phone number but never updated it in my iCloud account to the new one. Now, I lost access to all my iDevices and I want to restore my iCloud backup to an iPhone I got from a friend.
The problem is that when I enter my iCloud e-mail and password, it says that it sent an activation code to my other iDevices - but I don't have access to them. The only other option provided is a message to my phone-number, which is the old one however that doesn't exist anymore.
I know the password of the account and I have access to the e-mail address of that iCloud account - how can I get access to it?