on 03-08-2013 18:13
I'd go with turning off 3g and mobile data and use wifi where you can.
MacBook Air 11” Core i5 1.6GHz 4GB 128GB •1.6GHz dual-core Intel Core i5. OS X Yosemite.
iPhone 6 Plus ~ iOS 8.1
iPad Air ~ iOS 8.1
Mea familia est mea vita.
on 04-08-2013 10:01
Depending on where you're going, apart from some hotels, most WiFi is free, if you can find it. If you really need to use your phone you can always get a local PAYG sim for the time you're away. Just make sure your phone is unlocked before you go.