I may be traveling out of country in the near future. In the visited country I probably won't be making many phone calls. However, I would like to access the internet and keep some crucial information with me (or access it). On crossing back into the US it's improbable but customs might ask me to open my phone for them. I don't want to hassle with not opening the phone for them. I want a "clean" phone or device that I can open for them that has no access to any of my emails or other personal information. I think I know how to do this but am wondering if others have some real experience with this.