After my phone has been on anything over maybe, 8 hours, the text messaging just stops working. All the messages vanish and I recieve no new ones nor does it allow me to send new ones. I turn the phone off then back on, but I never get those message I have missed. How do I prevent this from happening in the first place? Please help!

What happens when you try to send a new one?

It does not send, or record that it has sent anything.

Try pulling the battery out for about 10 seconds, then press and hold alt + LGLG and clear the log. Hope this helps