I have just started using my i8510 as my main Sat Nav. I have version 5.00.50.
Twice yesterday my entire phone froze while navigating. In both cases I believe it was just after I had detoured and it needed to recalculate. I had to pull the battery to get it going again. (Luckily it remembered where I was navigating so it wasn't hard to continue).
Has anyone experienced this before? and is there anything that can be done about it?

