There's also the possibility the operating system isn't what you hoped it would be, and you want to make a change. Two of the most common operating systems for smartphones are iOS and Android.

Resist the urge to toss that old phone. Give it a second life by installing this open-source version of Android optimized for ...

Moreover, developers developed a couple of Nintendo Switch emulators thanks to Android’s flexibility ... An emulator is a program that lets one operating system run over the other.