As we all know with the smartphones we have today - they're no where near as tough and rugged as the Nokia we used to use back in the day. Those Nokias could be thrown around and dropped without any really harmful damage. Cases were easily replaceable and you could customise them. Unlike smartphones today where they're made from pretty brittle materials like glass, and can easily be damaged and scratched.
Francois Rybarcsyk has come up with a concept phone - the Sony XTRUD. Let me clarify that this is a concept phone, it's something that's been come up with randomly and has not been commissioned by Sony. It's literally been designed for fun and exploration.