The Wing does not have near enough memory(64mB) for a Windows Mobile 6 phone. Also it leaks memory so it needs to be power cycled every day, which is why you saw it with 6mB with no programs running. When I was using mine I had it up to 20mB left when it wasnt running any programs, but I had to adjust the ROM to get it to that. You can find how online, though it is dangerous and can brick the phone. Honestly, Id say wait till the next data device from HTC for Tmo, hopefully its the Kaiser II. However if you like the Shadow, it does have 128mB of memory, so it runs WM6 much better.