Bad move. They were already blocking banned sites using this method. I didn't had any problem with that. But blocking normal sites like Google and Twitter is unethical. I can still access sites with data savings turned on using VPN.
Jio started there blocking operations towards opera mini's data saving mode 1 or 2 week before. Initially legally blocked sites we can access through by turn on the data saving mode in opera mini.Now its also blocked completely. Normals sites are under partial blocking, because while reloading the site gets accessible sometimes.