I was able to convert from Postpaid to Prepaid from Airtel App. Search Migration in Help/Support. Follow instructions and also need to pay any pending due as per pro-rata basis.but i’ll have to go if I want to move from postpaid to prepaid.
Where is written... I saw it nowhere.... Only capping is that u have to call for more than 50 minutes per month if u use more than 150gb dataOkay, so Prepaid to Postpaid conversion through OTP without sim change still works. But not from Vi App. You'll have to follow this link: Convert from Vi Prepaid to Postpaid Online | Vi™
I converted my Prepaid to Postpaid yesterday and utterly disappointed. I choose 701 plan. And it's not UNLIMITED as they say. 2000GB cap.