JIO is aggressive in giving its sims. I think it may not be wonder, if they give sims to every person, who have 4g phone or not? with a preview offer of 90days. Their plan is people must be used to taste the godspeed for 3 months. Once commercial launch is done. the persons who are using preview may not stop. That is their plan. In india, the especially We people will go with mad when it is free. ( I saw one lady purchased item of Rs. 10k when they offered 10RS spoon as free) The strategy of JIO is taste the speed of 4g and other services of jio play. They need not convince the people about their quality of service while selling their product.