On 16 August of 2016, I purchased a Jio SIM along with a essential LYF phone. But when I came back home with the system, I found that in my area, the service is very poor. The signal is only 1 tower and the net speed is ridiculous. 1.6Mbps for download and 0.36Mbps for upload. But with full coverage area, the speed is more than 20Mbps. This is rooftop scenario. In the room of ground floor, there is no network at all.
I had called them several times to lodge complain about this. First time I got a complain number and a msg that it will be addressed within 48 hours. But no improvement till now. Moreover, after this, whenever I called them to know the progress on the issue, they told me that due to system problem, they can not lodge any complain nor they can view the status of my previous complain.
I do not want to blame the company for this. It is the truth that no company can provide full network across all India. I just want to warn people who just jumping out to purchase a 4G phone and a Jio Sim should first check the service status of Jio in their area. Otherwise they will end up to a 6500 Rupees(or even much higher) 4G mobile and a Jio Sim having unlimitted internet, call, SMS etc but unusable. Remember that even Jio SIM is free, you still first have a 4G mobile from the list of Jio company before get it.
Conclusion: Jio service is very good in many places. But You should check your area before buying. If the signal quality in your area is insufficient, it may take a long time to solve the issue, even your unlimited free time can expire before it.