I too have 2 of my friends who ported back in December from Airtel and had no issues but i guess the goof-up had to happen due to mad rush. Maybe they are out of ports which they can assign. I ported from Airtel but their 4g network is more or less the same and i have been using a second Jio sim since July with no major issues. I don't do downloads much but browsing on jio is way faster than Airtel. For me it is like browsing on Wifi and the call quality is superb as well. I waited patiently for the last 4 months, created 4 tickets on the Airtel open network and they doo acknowledge that a tower is needed but not much progress and it has been just showing "Tower Needed" on their map. Never the less, the impact on the battery backup due to poor coverage was also compelling factor. For now, i am tied to them till end of June. Will port out for sure if the saga continues.