Matrix sims are actually affordable --- I was of the opinion that all these international sim cards would be for the high class people and a working class person like me wont be able to afford those. Accidentally I did come across a matrix sims ad on social media and from there I booked myself a prepaid sim card for Singapore. I checked with the sales guy about everything, service and how would I recharge if I wanted to and some hundred othr questions and he patiently replied them all. I recharged the number for almost 3500 rs and then didn’t recharge it. I was in Singapore for 5 days and the service that I experienced with matrix sims was really good. As good as any post paid service provider. Excellent data and calls were pretty clear with no such disturbances. I didn’t spend a penny more than that while I read I would be billed massively and all. I mean am glad that I wisely chose a matrix sim card. I can surely go back to my friends and say its actually affordable and comes with good services..