I recently went to London from US. Bought the prepaidzero UK+Europe 12GB data SIM card and added cash on the card for talk/text. I was told it was compatible with my galaxy s5. When I put the sim card in my phone, my phone just said it didn't recognize the card and wouldn't do anything even through wifi. I bought it mostly for data so I could use GPS but thank goodness my daughter had a phone that worked. I couldn't contact prepaidzero until I returned as my phone wouldn't do anything and was told since I was already back there was nothing they could do. After many emails, I did receive a refund for the cash balance on my card for talk/text. It was a very frustrating experience during my vacation. I wouldn't recommend.