Hi. I've recently had a problem with phone freezing. Usually the reboot helped (battery out or power button for approx. 7 seconds), but once I went into the worrying "unable to boot" problem. After each attempt to boot the phone was stuck just after the animated Samsung logo. Here is how I fixed it (may work if you have a similar problem): - boot into recovery mode by powering on your device (Power key only!) and pressing Volume-Up and Home key on the splash screen showing "Samsung Galaxy R" static logo (release Power key, press Vol-Up+Home until you see "booting recovery" in white on top of the screen) - choose option "Wipe cache" (Vol-Up/Vol-Down to move across options), confirm (Home key) - reboot Note: you will loose (as far as I found out by now): - date & time (can be automatically updated by the network) - stored WiFi connection configuration Good luck!