I think GSM security is less relevant than ever, specially in India. More and more people are using Whatsapp and Messenger instead of voice calls. SMS is literally non-existent. Since Whatsapp is end to end encrypted, the carrier/govt simply cannot look at the contents.
PS: I wonder why you'd call one of the world's largest LTE networks "obscure". Number of Jio users is probably comparable to entire population of USA.