Three Mobile 24GB Pay As You Go Mobile Broadband SIM Card. Three 24GB SIM UK and International Data in over 70 Countries Worldwide Use this SIM in any Unlocked phone, tablet, dongle etc to give you 24GB data lasting up to 2 years Worldwide. Great for roaming when in holiday to cut down your phone bill, as an emergency back up for when your home router goes down, it has multiple uses. The data will last for 24 months or when you run out, whichever comes first, so plenty of time to use it.