I am using this jio sim for two months.and I am having a good experience.but after using one month.the net speed has become quite slow.but the voice calling proccessing is good.so I like this phone but I would suggest the makers to provide better network.and the welcome should stays for more days. so that more people can use it.but I have just one problem is that the customer service is not good. it would have been more understanding .so.i would suggest you to.use jio line.i love jiooooo.