Hi Hopefull2! Which service provider are you with? If this problem happens regularly, chances are that there might be a problem with your service provider. Contact them and let them know about this so they can do something about it.
Are you by any chance with Virgin? I have the lg rumor as well, and I havent been able to receive 2 -part texts for like 3 months...I kept calling in and complaining, and now virgin says they'll cover me getting a new cell. See if you can get the same deal....the problem doesnt go away