Xperia arc S is available for free from Vodafone UK with new two-year agreements at £31 per month that will net customers 600 minutes unlimited texts and 500 MB of data.
A cheaper £26 per month plan is also available with the Xperia arc S but then customers will have to pay an additional £99 for the handset.
A follow-up of the original Xperia arc Sony Ericsson Xperia arc S was unveiled last month and made its first appearance at IFA 2011.
However aside the bump in processor's speed the Xperia arc S does not offer anything new in terms of specs and features the same hardware configuration and design as the original version.
The phone measures 125 x 63 mm and is only 8.7 mm which makes it one of the slimmest Android phones available on the market.
The Xperia arc S is perfectly balanced at 117g battery included and feels excellent when kept in hand.
The device comes with a brilliant 4.2-inch LED-backlit LCD capacitive touchscreen display which is based on Sony Mobile BRAVIA Engine and features a scratch-resistant surface.
The screen supports 16 million colors 480 x 854 pixels resolution and offers accelerometer sensor for auto-rotate and multi-touch input method.
Xperia arc S has the same amount of memory as the standard version: 1 GB storage 320 MB user-available 512 MB of RAM and microSD card slot for memory expansion up to 32GB 8 GB memory card included.
Another strong point of the smartphone is the 8-megapixel camera with autofocus, LED flash, video calling, face and smile detection, 3D sweep panorama, image stabilization and HD video recording capabilities.