Globe is tied up with Vodafone here in the UK..I'm using my Globe simcard so my family can text me without costing them more than one peso per text..although I'm only using it for receiving texts..coz calls (both incoming and outgoing) and replying to texts would costs me a lot. Just make sure the Globe simcard can be used for roaming and has credits. Try asking Vodafone if you can use their simcard since it's tied up with Globe.