Ok so it was sunday last week when I last read and posted about this issue and as I have said, I was suffering the same problem lately. In a span of 1 week, I was confronted by the same problem four times. There were times when I cannot send messages in an instance and I have to clear the data and cache of the "messaging" app everytime it happens. It was ok at first, but suffering such kind of problem 4 times this week is a bit frustrating already. Recalling I have said last sunday, this happened to me even before I installed new apps to my phone. I was wondering, does this readily indicate hardware problems with my phone? I asked my brother who owns an Acer Liquid z200 and he said that he had never experienced such problem in the 2 years of owning his phone. Please help me. I need to decide whether I have to avail my warranty already or something could be done to alleviate this. TY!