@c0n57an71n I admit, this is an advantage of the PinePhone. I also miss a dual boot option for Ubuntu Touch. Some apps only work on newer Android releases. I currently carry around three different Samsung Galaxy S5 devices with different Android versions. Each for it's on purpose. One for ANT+, one for writing capability to the SD card, and one for phone calls the latest Android apps. With Ubuntu Touch, there will be one device more. Multi boot could solve the problem.