Every time I send or receive a group text, my phone freezes. No response from any buttons; there is nothing I can do but wait. VERY time consuming to use group messaging. I'm not using a 3rd party messaging program, I've tried clearing the cache, restarting the messaging program, restarting the phone, resetting the phone, nothing works. Problem has existed ever since I've had the phone, so it has nothing to do with the update. Anyone else having this problem? Any ideas?