I must say, it's quite buggy. It gets restarted on its own. Channel changes automatically to LCN 95. TV Input error used to show frequently.
I also made a complaint and replaced the box as well but the problem persisted. Then i disconnected the WiFi and issues were sorted. As i have FireTv Stick, toh i didn't worried for online content.
But now after around 3 months, i have again connected it to Wifi and its running smoothly.
I remember problem grew much when the Amazon Prime Video app was added officially on the box. Since then i have not logged in with either Prime or Netflix on the box. whenever i want to watch, i switch to HDMI 2 for FireTv Stick.
My genuine suggestion, plz do not upgrade. I got the offer of upgradation for Rs. 700, thats why i did.