Was browsing the net on my phone, for an upgrade as it happened, and got called for my tea. Put the phone down, still on the browser page and had my tea.
Returned to browsing and found phone had locked. Clock stopped, can't move from the browser page, none of the buttons work, and, can't switch off. I can hear the tone that would allow me to switch down, or go into aircraft mode etc, but that message doesn't appear.
I have tried pushing the off button for an eternity - nada. I've put it on the charger - nada. Non removeable battery.