I am using jio since jio was first launched. Reliance Jio is so called 4G but they are providing very slow Internet about 10 kb/s. Most of time network coverage is low, I have to put my phone on flight mode or restart it to be able to to call someone.
There customer care service is also not good. One day my Internet was working very slow so I called to customer care and told them about my problem then they told me that the problem will be solved as soon as possible, but there was improvement.
They provide you Internet packs at cheap rates but Internet works so slow that I was not able to use it properly.