Sorry squirrel you would need to be alot more specific! I can listen happilly to radio 5 live - works fine for me. I can watch youtube footy clips, and also listen to podcasts (including sports ones)... What it struggles with is the live tv / larger streamers such as iplayer. Sound is ok, but video is unwatchable. WIth regards to data - it really depends on what you are watching - hence more specific. If you have any test websites, i can try them for you