I tried buying a PAYG Mifi from 3 online, but its not that easy.

You can only buy it online if you live in the UK. So I called the customer service line.

You can go a store in London and buy one, but the sell them for GBP69.99 with 3GB. Now that is around $120! They only work in the UK and its a pain to take a few hours from my 5 precious days in London.

I would go for Boingo or renting one from fonmigo, its $55 and 1GB seems like enough for iPhone.. More convenient and econmical given my circumstances..Not sure what to choice one is cheaper but the other is more mobile.. hummm