O2 has just announced that, due to expected high demand for the iPhone 3G, orders will be limited to just one per customer on a strictly first-come-first-serve basis. It’s not clear whether the Carphone Warehouse will also impose this restriction, but it’s likely.

Unlike our American friends, who have now been told by AT&T that the handset will go on sale from 8am local time at AT&T stores, all we have to go on is the 11th July date. Rumours of O2 stores opening at 7am may be true, though we never saw preregistration begin yesterday…