1, 30Mbps should suffice.
2, I think 599 plan is only available in Postpaid.
I prefer prepaid. You can only pay/recharge from My Jio app/their own site. So payment option are based on their own gateway. No option from 3rd party site
3, Range is kind of Ok-good. May need an extension based on your house. I ve set my router to High range in settings.
4, Good for me, never faced much problem. I think only one down time.
5, offers change from time to time.. I would suggest to try 1 month 30Mbps and if not satisfied with speed then move to higher..
+ As per Netflix 15 Mbps is recommended for 4K streams.
30Mbps is enough for a family.
Anyways even if you feel speed issues you can always recharge higher speeds for a month and try @drjpatwa .
Even with 30Mbps, when our family runs 4-5 devices parallely, I have seen 10 Mbps being unused. So try it out yourself.
Bro 30Mbps Is Sufficient For Stream Live Tv Channels. I Have 30Mbps Connection Plays Sony liv Live Channels Smoothly
30Mbps may or may not suffice but 30MBPS will for sure!