Operating System market and how to change your OS?
According to https://www.idc.com/promo/smartphone-market-share/os the current market shares for 2020 are the following ones:
- Android (86,6%)
- iOS (13,4%)
and as you can read from those... it does not let much space for any third contender.
About Android
"Android is a mobile operating system based on a modified version of the Linux kernel and other open source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance, with the main contributor and commercial marketer being Google." Source: https://en.wikipedia.org/wiki/Android_(operating_system).
Though a huge part of this Operating System is open source, it also contained proprietary technologies which are the reasons why some communities are asking for alternatives to it.
About iOS
"iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that presently powers many of the company's mobile devices, including the iPhone, and iPod Touch; it also powered the iPad prior to the introduction of iPadOS in 2019." Source: https://en.wikipedia.org/wiki/IOS
iOS is a close source operating system.
How to change your native operating system on your smartphone?
There are alternatives to Android and iOS, thought they highly depends of your smartphone device. So to say the older your smartphone is the less chances you can find an operating system which is still maintained.
What you need to understand is that there are very few alternatives including hardware and software for smartphones if you don't go for either Android nor Apple, for example: https://puri.sm/products/
This action means getting rid of your native operating system by changing it to another one which may not support that well all the components of your smartphone.
Note: waiting for my smartphone to be repaired in order to record the video.