In the past few days, many users of the iPhone and Gmail Push service through active sync have been reporting that it is not working. A large Google Mobile Help thread has dozens of posts from unhappy Gmail users.

Google confirmed the issue and blamed the iPhone OS 3.1.2 build, which was out just about a month ago. So I am not sure why people are beginning to complain now.

Robin from the Google Mobile team confirmed the issue and wrote a few responses in the thread. They include:

So, if you pay for the Google Apps premier, you are out of luck. Gmail push for the iPhone is a beta product and is thus not covered.

Forum discussion at Google Mobile Help.