O2 revises its iPhone service plans

In an attempt to spur more iPhone sales, O2 announced renewed iPhone plans, starting on February, 1st.
The £ 35 plan now holds 600 minutes.
The £ 45 plan now holds 1200 minutes, thus replacing the £ 55 plan.
A new £ 75 plan has been announced too, with 3000 minutes (50 hours) credit.
All plans have unlimited (fair use policy) data communication, unlimited O2-hotspot access and 500 SMS.
They're not lowering the cost of the iPhone plans, but they're offering more minutes (and SMS in some cases) for the same price.