So this all started a few weeks ago. If I try to send a sms or mms using either handcent or the default messenger app i get an error message that says "Unfortunately, the process com.android.phone has stopped". I also noticed that if I open a thread from one specific contact "Theresa" that will cause the same crash. I can open any other thread from any other contact and it will be fine if I dont try to send them a sms or mms. I tried deleting the Theresa thread but the process crashes and the deletion does not take. I tried clearing cache for both handcent and default messaging. I also did a factory restet. Any help with this would be great as I have not been able to send text message for 3 weeks and texting in my primary use for my phone.

edit: Im running a galaxy s2 on virgin mobile.