I recently upgraded my cell phone (or mobile phone, for some people). I used to have a feature phone, but the opportunity arose for me to change to a new phone that runs the Windows Phone 7.5 (aka Mango) operating system. Getting used to the physical phone, from one with real keys to one with a keyboard display, wasn’t the biggest adjustment – but getting used to the new way of doing things, actually doing everything, was an enormous challenge for me. In tech speak it’s called changing the UX (user experience). The last time I had such a challenge was moving from a DOS-based PC to one running the first version of Windows.