I am using Jio as it provides high data rates initially after that high speed till 1GB, 100 free sms unlimited calls but still it has some problems like network issue and in some areas no proper network and data connectivity.
But I would say it is useful because even if its has network issue cost wise its efficient and I dont know how many of you know about jio money app if you recharge through that u get 50 rs gift voucher. you can make use of that for the next time recharge