Here’s a great quote on dual booting a phone from an ArsTechnica article:
Don’t you just love setting up your smartphone? Entering
account details, downloading apps, putting all the settings just the way
you like them? Isn’t this experience so wonderful that you want to do
Wouldn’t the smartphone experience just be so much better if it had
two entirely different sets of apps? Apps that couldn’t talk to each
other, didn’t even acknowledge each other’s existence? Apps that burn up
the already limited smartphone storage?
And who doesn’t relish the opportunity to reboot their smartphone several times a day to switch between operating systems?
I can’t help but feel that this is a solution that essentially nobody
wants. Dual-booting is inconvenient at the best of times, as you
inevitably end up in the wrong operating system for the task at hand,
regardless of which operating system you’re currently using. Add in the
wasted disk space, the time wasted rebooting, and the overall
complexity, and it’s hard to believe that such a thing is truly coming