Can I upgrade my iphone on pay as you go?

Iphone on payg

As in get a new one from the provider? No you can't.

No, you would have to either sell it and get a new one or go on contract. They don't give phones out or upgrade them on pay as you go due to the fact it isn't definite that you will keep topping it, and you could basically get a free phone, if mobile providers did that they would go bankrupt as they'd be losing millions of £'s worth of mobile phones.

If your network shop has the phone you want available on payg then yes there's no problem. You just need to pay the price they are asking (usually 1/3 of actual cost) plus any top up charge they might require. If you want to keep same number that can be sorted at same time but might cost a bit extra.