I've been having the same issue. My husband has the X as well & his is perfectly fine. I bought both our X's at the same time. Both are stock & no task killers or antivirus. Getting really irritating. I've done the *228, airplane mode & factory reset to no avail. I think its time to make a trip to Verizon.
Sent from my DROIDX
Sent from my DROIDX