http://prepaid-data-sim-card.wikia.com/wiki/Andorra
Looks like a portable wifi dongle might be better
Not easy to find one that'll work there. Andorra is excluded from all the EU rates and anywhere that'll let me add worldwide usage is on a monthly contract.
@Roosterrun started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
http://prepaid-data-sim-card.wikia.com/wiki/Andorra
Looks like a portable wifi dongle might be better