Wondering if anyone else has had this issue, I've searched and searched to no avail. I'll look at my signal strength sometimes and it'll go from full to 1 bar or "circle", and nothing sends out whether it's a text message or an iMessage. Theoretically iMessages should send regardless if you have signal as long as you're on wifi but it still will not go through. I have to shut down and restart my phone and then it will work, or turning on and off airplane mode I believe works too. This has been going on for longer than just beta 3. It happens every once in a while, sometimes within a few minutes of each other it'll happen multiple times, or maybe only once a day. Again, I didn't see anyone else posting about this so I figured I'd ask.