Has anyone used an international plan for their cell phone?

My sister who's in the UK, when she visits us here, she still uses her phone plan. I think she's on Vodafone. She just asks Vodafone to turn on the "roaming" feature of her cell phone so that she won't change numbers and it would get charged to her bill. If you get a prepaid phone in the country you're going, it would be cost effective if the exchange rate of the US dollar to the local currency is higher.

Hi coachflaps! Well, I'm not really familiar with International Plan there because here in the Philippines if you are going abroad and you would like for your network to still work whether you are a plan or prepaid subscriber, you just have to go the nearest business center and tell them that you would like to have your international roaming on and it's for free. However, the charges are more than half of what you spend locally. Try asking your network about your roaming if it's available. I'm not sure what my sister's network provider is (because she lives in the US) but when she comes here once a year, she just buys a prepaid simcard to get in touch with her husband and kids.