Popular UK mobile network O2 has officially added the HTC One X+ to its smartphone arsenal, offering the new Android device on a range of tariffs headlined by a £41 a month deal that includes a free handset and a 2GB monthly data allowance in addition to unlimited calls and texts.

A highly intriguing new device in time for the lucrative holiday shopping season, the HTC One X+ sports a gargantuan 4.7in display and features the latest version of Google's mobile operating system, Android 4.1 Jelly Bean, in addition to a whopping 64GB of on-board storage, Beats Audio technology, an 8-megapixel primary camera, and a quad-core Nvidia processor clocked at 1.7GHz.

O2 is also using the HTC One X+ to begin realising its aspirations as an environmentally-friendly mobile provider, with the UK network and the Taiwanese manufacturer holding good on earlier promises to ship the device without a mains charger.

"The environmental cost of multiple and redundant chargers [is] enormous and I believe that, as the mobile phone has become more prevalent, we as retailers and manufacturers have an ever-greater responsibility to be a more sustainable industry," said O2 CEO Ronan Dunne.

Instead of a traditional mains charger, the HTC One X+ will come packaged with a microUSB cable so users can charge their smartphone via existing devices like desktops and notebooks.

Back in September, ITProPortal revealed that the HTC One X+ had been outed in O2's newest seasonal catalogue. As expected, SIM-free pricing for the smartphone has been set at £480.

The Taiwanese firm's latest Android flagship device faces stiff competition from the iPhone 5 and the new Windows Phone 8 handset line-up including the Nokia Lumia 920 as well as HTC's own 8X.