blackberry rebooting

[nasa1303]

hello blackberry people. i have been a windows mobile user for the last few years ever since i got into smartphones. i have never used a blackberry phone myself. i bought my wife a blackberry curve 8330 for sprint for valentines day. it is her first smartphone. she loves it so far except for the fact that it will randomly reboot itself quite often. she will be in the middle of playing a game on it or doing something and it will get real sluggish and freeze up for a second then reboot on it's own. these things take forever to load up as yall know. is there anything i can do to it to stop this from happening?