iPhone Compatibility with Pre-Paid SIM Cards

[wet_egCA]

I am visiting Portugal for two weeks in October and was planning to get a SIM card to use with an iPhone 5 I have saved for travel purposes. Will a Vodafone SIM card I purchase in Portugal work on an (unlocked) iPhone 5?  Thanks.

[BandOfBrothers]

As long as the iPhone is unlocked to all networks @wet_egCA the phone should present no issues using the sim card.