I have been researching how it is possible to gain access to a phone's file system using something like the phone number, IMEI number or other identification number in a similar way that I can SSH or FTP into a computer if I have its IP address. I have found different resources from Cisco such as IP Phone, SCCP & SIP Phone Registration Process with CUCM and this document.
But I was wondering if anyone knows the specific answer to this. I know that it is possible to gain access to the file system and OS of a phone remotely using some protocol. I am specifically trying to gain remote access to my iPhone's file system with just the phone number of the phone. I know it is not an Android, but I am guessing it is the same process regardless of phone OS.