I have a mini 2 which is great. I’m heading out on a road trip and I bought a backup mini 2, just in cast I have a problem and I’m in the middle of nowhere. I plan on returning it if I don’t use it - I haven’t opened it. Question: will it work right out of the box, or will I have to download a firmware update? This might be a problem because I’ll have my cell phone data, but won’t be able to download large files. Thanks