Help Android Wont Update, Stuck on 2.2

[Smokn_X2]

Hello,

I looked around for a while before I decided to post, and I didn't come across this problem yet. So here it goes:
My wife and I both have the same Droid Incredible, She got her's 6 months after I got mine so mines older.
Her phone updated to 2.3.4 and I'm still on 2.2 without any option to upgrade. It's really not a big deal to me, but I was curious as to what causes this and if it will eventually affect anything app wise.

Thanks for any reply!