I have just seeen a useful post
here.
Date: Wed 24 Sep 2008 13:36
From: Theo Markettos
At the beginning of September Vodafone moved most of their PAYG customers onto the 'Simply' price plan, where Simply='more expensive'. This is a particularly bad deal if you're on Stop The Clock, because it's just doubled the cost of your StC calls.
This is just a quick reminder that you can switch back to Anynet before the end of the month. It's simple and free - just dial 2345, options 3, 2, 1, and 1. Haven't tested it yet but I'm now back on the Anynet plan.
Theo