As the title says really - I'm on the lookout for a cheap PAYG phone on the o2 network. I'm getting an iPhone so want one to use as a backup / spare - I'm hoping to swap the SIM card from the iphone into the spare phone on heavy nights out / stag weekends etc.
Any ideas on a (very!) cheap reliable phone that's easy to use, does the basics and has a good battery life?
I've always had Nokia / SE in the past so one of those preferred.