Visited Jio store just yesterday and ported in January. Currently, first recharge amount they are providing is Rs 299 for 2GB per day data for a month and additional Rs 99 for Jio Prime. Both are mandatory. Similarly, port is also technically free and at home but Rs 99 is mandatory regardless of whether you opt for Postpaid or Prepaid sim.
There are some offers only for select regions or special schemes I think which usually create stalls with Jio Umbrella.