1) Make friends with someone working for Reliance
The easiest way to get a Jio SIM is to know someone who works with Reliance. The company allows employees to refer a certain number of people to get Jio SIMs that can be used in your phone. Most Reliance employees are probably used to getting friend requests on Facebook from people that just want a SIM, so you might want to try one of the other methods instead.
Reliance Retail's Lyf range of phones hasn't been getting the most spectacular reviews, but it's the easiest way to get a new Reliance Jio connection right now. Just walk into a Reliance Digital Store, ask for a new Lyf phone, and you're live on Reliance Jio. You can get a phone for around Rs. 3,000, and you'll get three months of free, unlimited Internet access and calling along with it.
We can inform you that buying a phone like this, turning on the Wi-Fi hotspot, and using 4G to power your entire home's Internet access, works just fine, and the speed and reliability (at the moment) is better than most broadband connections at home.
This gives you free, unlimited data, calling, and access to all of Jio's apps for three months, or until the commercial launch of Reliance Jio, whichever is later. But if you don't want to carry around an extra handset everywhere you go, there are more options.
3) Get a high-end Samsung phone
If Lyf is Jio's bottom up approach to getting people to try out the network, then it's Samsung offer is the top-down method. If you've got one of the following (relatively recent/ better) Samsung phones, then you just need to download the MyJio app, and tap on "Get Jio SIM". Here are the eligible phones.