By I bought 1 week ago a Samsung Galaxy Ace (Samsung Galaxy Ace).
This SmartPhone is very nice, operating system is very good (Android 2.3). But after just 1 day the phone randomly freezed. I search a couple of hours on the internet and I found that the problem apparently is caused by the Wi-Fi. (you can read here and here). Somehow when the Wi-Fi is on and the phone goes Idle, and you don’t have anymore Wi-Fi signal, then the screen freezes.
Solution (temporary) : Turn off Wi-Fi when you don’t use it. 🙂 I’m hoping that Samsung will fix this soon.
octavian sfetcu 