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I've answered my own question, in there technical guide it states "Note 1: Not compatible with 2009 and onwards Vodafone SIM cards or the 3 mobile network. Note 2: SIM cards must be activated and, in the case of Pay-As-You-Go SIM cards, have a credit balance before they can be used."...

Are you able to use any Network Sim card in GSM Diallers, I have found this one, it say's it can use most, I was looking to fit it in a property in Spain, any thought's? http://www.citysecuritysystems.co.uk/gjd-external-detectors/gjd-gsm-dialler