There is no lag while casting video from Jio phone for jiotv... just small lag only while video call which is expected for ₹1500 phone infact if you go for hdmi cable then even standard definition channel are in 16:9 ratio and unlike jiotv app for phone and you will get Hdmi cable with hdmi jiomedia cable and RCA cable with RCA Jio media cable
Even i have heard that star channel wont run on jio phone please confirm if anyone got jio phone bcoz hotstar is still not supportive on jio phone with kaiOS system.