Heads-up as I've just gone for this deal.
Nokia 5800 XpressMusic with FREE 8gb Micro SD - UNLOCKED
600 Anytime Minutes
£20 per month, but first 14 Months Half Price @ £10 Per month
Orange Dolphin 30 (usual price £30 per month) £10 permanent Orange discount = £20 per month over 24 months
Half Price Line Rental for first 14 months (by redemption) , so £10 per month.
£40 Quidco Too!!
Great phone, I've had one before, but sold before the prices started to come down for £180.
24 months @ £20 per month = £480 - £140 for redemption = £340 - £40 Quidco = £300 Divided by 24 months = £12.50 per month.
I'm happy with this amount with a great handset, lots of minutes, more texts than I'll ever need and internet.