Not tried Netflix sorry but Amazon Prime wouldn't load for me until I cleared the cache. I guess it also depends on just how much data you're using and quality of pic HD, Ultra HD etc. I also had YouTube issues on live streams where the sound and pic were out of sync. I googled my prob and then learnt about the cache issue. Prob a hard reset on your tv would do the same but then you might have to enter all the network settings. Just google re-setting memory cache for your model of tv.