Seriously, we do have same challenges of people not having data on their phones, but I think the best thing to do is to be prepared so that it won't be a hindrance in signing them up. Normally, I try to make sure I have enough subscription before going for a road show, so that I can share my data with such people through Hotspot, with his, they won't have an excuse not to sign up.
Well detailed information and good efforts. Job well done!