is there any other forms of "OS", that can be used with iphone?. ?

Answer 1

yes but it is difficult to install and not supported by Apple

Answer 2

yes but it is difficult to install and not supported by Apple 

Answer 3

No. Remember Apple already has control of software and hardware on every iPhone it makes and will let no third-party operating system on it.

Answer 4

Apple controls the software and hardware of iPhones

Answer 5

just google it, you didn't even say what specific kind of iphone you have. either way, apple products are garbage. and you are garbage

Answer 6

Sort of. There is an open source project to get android to work on an iPhone and it does but you lose most of the functionality

https://nakedsecurity.sophos.com/2020/03/06/run-an...

Answer 7

Realistically, no. Apple controls the software and hardware of iPhones and they won't allow a third party OS on their phones. There was a project years ago with the goal of getting Android to run on iPhones but it has been long abandoned. 

Answer 8

Any OS could be made to run on an iPhone as it's hardware isn't anything special.  However the ability to access and thus change the OS is quite difficult.