Fix for iMessage not working after latest update

After we updated our iPhone 4 we could no longer send pictures through iMessage. After days of being on the phone to Verizon, apple, and Internet provider Comcast, and nobody taking responsibility, finally got a Comcast guy here and he changed my router to default settings. Changed password back to original on back of router. Fixed the problem. I knew it was a problem with my Wi-Fi because I went to Starbucks and connected to their wi if and iMessage sent pictures.

How is this a question, you answered it yourself?