I'm traveling to Canada for a few days next week and I would like to use my iPhone 4 while there.
I do not want/need:
cellular data (data roaming)
I do want:
GPS (so I can geotag photos, pull up maps while on wifi, etc.)
wifi (so Airplane Mode won't cut it)
What settings are needed to make certain I don't incur roaming/data charges while still allowing me to use the GPS antenna?