Share your experience!
I am not able to send multiple SMS exactly more than two sms, "Invalid Contacts Selected" where first two name is displayed then "and More" is displayed, whenever it displays like this it does not work, however if the list is shown i can send it without any problem, this must be a bug as i had never faced it in 4.1.2.
Sounds strange! I cannot recreate your problem. I suggest that you try to clear date for the messaging app. Go to settings > apps > the tab all > messaging > clear data. Restart your phone and try again.
If the problem persists, I suggest that you repair the phone software using PC Companion: