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Moving to GMail on your iPhone - AccuWeaver
After moving from a hosted Exchange service to GMail, you need to set up your email client on the iPhone so that it will receive the push notices.To do this, you need to add a new Exchange service on the device. There’s a nice step by step of this at http://support.google.com/a/users/bin/answer.py?hl=en&answer=138740Alternatively, you can use the standard