Strongly considering the purchase of a new LTE/Wifi iPad Air or iPad mini (retina). We are travelling to Hawaii for a few weeks this winter, and I'd like to be able to use the device while I'm there. Assuming that I purchase the unit in Canada, I am looking for guidance on the following issues: 1) Does it matter which "network" I choose when purchasing my iPad (Rogers, Bell or Telus)? For instance, if I purchase the Rogers model, does it give me additional carrier options in the US (over, say, the Bell or Telus model)? 2) Will a T-Mobile nano sim work in a Canadian iPad? T-Mobile appears to have the most competitive monthly (pre-paid) plan options, so I am leaning towards grabbing a T-Mobile SIM ... but I am also open to plan suggestions from others who travel to the US frequently. 3) Any other tips for a Canadian travelling to the US with an iPad? Thanks in advance for the help and suggestions!