Hi all. I'm extremely new to the smartphone game having rocked the same old Nokia since 2004 and, while I'm not completely ready to jump in as far as many others have, I have a few basic questions regarding my journey into the world of phones with fancy futuristic things like cameras, colors, and actual ringtones. I am an American expat in Germany and I have been surviving on prepaid cell service for 4 years now. It costs me around 15 Euro per month because I barely use it at all. For the last year or so I've been seeing someone and we basically only call each other and send about 20 texts per month. Strangely enough, she's in a similar situation with her phone (prepaid) and we're both looking at Desire HDs as our entry into the smartphone world. Since we would like for our monthly costs to remain as low as possible, we are entertaining the idea of using a simple prepaid voice only SIM in our new phones. The reasons for this are twofold: A) We travel extensively and do not wish to get involved in the incredibly expensive and confusing details of roaming data and B) We find that nearly everywhere we go (work, home, fav restaurants/coffe shops) we have wifi available. Therefore, if we can get by with prepaid voice and wifi only data that is the way we want to go. That said, here are a few questions. We want these phones to enhance our traveling experience in several ways. Two of those major ways are through GPS and translation software. Regarding GPS, can the GPS on the Desire be used without a data connection? Regarding translation software, I've seen demos of people taking pictures of signs and such and having the signs translated. Does that capability (not sure the app name) require data? If so, can anyone recommend a robust and capable translation app of any kind that DOES NOT require data. If my plan turns out to be doable and wifi is the exclusive means by which I use my phone for data purposes, will my device be able to receive software updates via wifi? I'm assuming from what I've read that when (for instance) an OS upgrade is available it will be delivered over the air, so could this happen over wifi instead of cell data? To piggy back off of that question, can I install apps via wifi as I would via cell data? Lastly, will not having a constant data connection improve my battery life? I'm not interested in having to charge my phone every 7 hours lest it become a brick. I appreciate the time taken to read all of that crap. I guess the tl;dr version would be this: I want to use a prepaid voice only SIM in a Desire HD and use only wifi for data. Please give your stories/advice/warnings about that idea.