Five years is a really long time in the mobile industry, and will be for the coming decade, even if the crazy tempo is slowing somewhat. According to wikipedia

Five years is a really long time in the mobile industry, and will be for the coming decade, even if the crazy tempo is slowing somewhat. According to wikipedia [1] typical high-end 2009 phone (which is just three years) had 256 MB RAM and 600 mhz ARMv6 processor. I think two or three years would be enough, with todays rate of improvement. Other than that, it's a great idea. [1] https://en.wikipedia.org/wiki/Comparison_of_Android_devices https://en.wikipedia.org/wiki/Comparison_of_Android_devices