This is my second Thunderbolt (it was replaced do to the microphone not working) and I had the same problem with the first one. No matter how many bars I have on the strength I keep having to resend the text over and over. Sometimes it will go thru and other times it will not. The last few times I tried to send one I wrote down the following message: Cause Code: 3 Error Class: 2.
Is there anything I can do to fix this problem? I am in south Florida and have great service here.