I was planning to travel solo to London and Scotland and I was looking at various international sim card options. And after reading all sorts of reviews on all service providers, I decided to use a matrix sim card.  Although there weren’t enough positive reviews about the, but others were worst. I bought their standard plan for UK and I was educated on how to make calls etc. I was really happy that I went ahead and chose matrix sims because it didn’t let me down at all.