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I have a sony xz3 and can not gerr bbc iplayer streams to cover the whole screen. I have large boarders either side. Can anyone help please with a fix. Thanks
This is a 3rd party app that probably isn't adapted to large screens.
You'd better take up contact with the developers.
Have you tried reinstalling the app in case of software updates? There are some iplayer for mobile FAQs here www.bbc.co.uk/iplayer/help/troubleshooting/mobile-tablet/troubleshooting_mobile