Groupon had an offer that sounded too good to be true this morning. A 16GB iPhone 4S for £19. That’s apparently a saving of £124.77, or an 87 per cent discount.

Of course to qualify for the deal you have to sign up to a 24-month contract at £34 a month. This includes: Unlimited data including Internet tethering; 5,000 texts per month; 2,000 minutes per month. You also get a Logic3 iPhone Speaker dock according to the description.

According to the Groupon page, 2,546 people have already cashed in on the deal which will run for the next three days.

While the offer is limited to one person, it is possible to ‘buy multiples as gifts’, which might explain the high number of sales.

The deal is on behalf of www.affordablemobiles.co.uk, a digital arm of Shebang Technologies Group.

On their website Affordable Mobiles currently offers an iPhone 4S (16GB, black) for free, on a £36 a month contract. This 24-month deal gives users: 300 Minutes; Unlimited Texts; 1.00 Data. The company offers deals from all the major networks.

By comparison, the best iPhone deal (according to MoneySuperMarket) is for a free iPhone 4S, 16GB, 300 minutes, unlimited texts, 500MB data, for £31 a month for 24 months (but including cashback, so it’s more like £29.71 a month). That’s with Vodafone, via MobilePhonesDirect. 

Today's top stories: 
Greenpeace infiltrates Apple's Cupertino campus
£19 iPhone Groupon, but is it the best iPhone deal?
Wozniak reveals why Steve Jobs loved secrecy
Mid-month rumours: Macs, iOS 6, TV and iPhone latest
New MacBook Pro, MacBook Air, iMac in June
New iPhone to have flexible display – report
Siri: Just Kidding, iPhone is Best Smartphone Ever
Apple best smartphone vendor for consumer satisfaction
Analyst says Apple doesn't have space for television
Foxconn denies 'working on Apple television' claims
Sell Apple, buy Facebook, report
Latest OS X update 'breaks' some Macs
Kaspersky denies  working with Apple on Mac security
Apple Leopard security update includes Flashback remover
Apple to update iCloud at WWDC
Apple admits second iCloud mail outage
Apple: MobileMe mail will still be available without iCloud
CS 6 plugins updated