Do you have voice and data roaming turned on?
Turn off the phone completely (hold sleep/wake button until turn off slide comes up. After off for 30 seconds or so, press the sleep/wake button until an Apple logo comes up).
Hi Glasgal, I hope your trip on the road is exciting and let me help you get connected. What zip code are you in? Are you trying to connect to Wifi? Here's a link to help you with the settings on wi-fi http://tiny.cc/0uxl2x and to change your setting back to cellular data, use this link http://tiny.cc/wxxl2x . Keep us posted.
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