Updated: The best iPhone 6S deal for Christmas: save £150 with code XMAS150

Update: this deal will run up until midnight on 31st DecemberIf you're looking for a great deal on an iPhone 6S before Christmas, this is a bit of a cracker. Mobiles.co.uk and O2 are currently offering a fantastic deal on the best-of-the-best iPhone 6S 128GB.The deal allows you to save £150 on the up front cost of the phone and then get yourself on a good value contract with O2.It looks to be by far the cheapest and best-value way of getting hold of the iPhone 6S 128GB and even beats most