As a one-time deal, UK based retailer, Expansys, has cut the sale price of the Samsung Galaxy S3 ( Garnet Red Version) to just £400.  Do look the image above carefully though, and you should see that this awesome deal is available only through today (11 p.m GMT)

The SIM-free device comes unlocked and unbranded, so you can pop in your existing SIM card and use it on any GSM network. A 12-month EU-wide warranty is also included.

The Samsung Galaxy S3 packs a 1.4GHz quad-core Exynos processor, 1GB of RAM, and 16GB of internal storage. It also shows off a stunning 4.8-inch 720p Super AMOLED display, an 8-megapixel rear-facing camera with autofocus and an LED flash, and a 1.9-megapixel front-facing camera. It comes with Android 4.0 Ice Cream Sandwich out of the box, upgradable to Android 4.1 Jellybean.

Given the popularity of this device, this is one of the best and lowest prices that you shold be able to find for a brand new unlocked and SIM-free Galaxy S3 in the UK.

Like I mentioned right at the beginning, the offer is only valid for today, and at such an awesome price, stocks are likely to run out soon. So if you’ve been wanting to get yourself a new phone, this might be just the opportunity you were waiting for. If you manage to get one, don’t forget where you read about it first, and let us know in comments below.