I just got an iphone, in hopes of using the Lines App and OLP Transportation Wizard App while in WDW. Now I'm trying to figure out what pkg's to add to my Telus Mobility plan, and was looking at adding the US Data plan ($10 flat fee gives you a rate of $1/MB). I don't plan on using my phone for calls at all, but may add their voice pkg as well just in case. ($5 flat rate for $1/minute rate). I don't think I'll need to txt msg while down there, and am just going to let family know to phone me if there's an emergency. So all I really plan on using it for is the Lines app and Transp. Wizard App. I can refrain from Facebook and checking email if I have to! I think all I have to do to set up my phone is disable the 'Push' setting for my emails and Facebook? I thought I was all set, then I was reading about horror stories of people who didn't turn off the Data Roaming switch on their phone and ended up with thousand dollar phone bills. It says right on my phone, under 'General' - 'Network' - 'Data Roaming' to be sure to turn data roaming off when abroad to avoid substantial roaming charges when using email, MMS, web browsing, and other data services. This might be a dumb question, but if that's off won't I NOT be able to use the Lines and Transp Wizard Apps while there?? Now I'm scared to turn it on though!