UK network carrier, Three, is now having a full force sale on new Sony Xperia smartphones including Xperia Z1, Xperia Z Ultra and Xperia M with three offers that lasts for the entire month of January.

Sony Xperia Z1

The current Sony flagship, Xperia Z1, is being offered for as low as £34 a month with £30 saving featuring Ultimate Internet 500 service. The Xperia Z1 features 5 inches of full HD display, quad-core processor, 2 GB of RAM, 20.7 MP Sony G lens camera with Carl Zeiss optics and water resistance for the following discounted options:

The One Plan: Costs £38 a month with £19 upfront cost

Ultimate Internet 100: Costs £36 a month with £19 upfront cost

Ultimate Internet 500: Costs £34 a month with £19 upfront cost

Those who plan on taking the Ultimate Internet 500 will get 500 minutes of calls, 5,000 text messages and unlimited data plus 4G connectivity without any extra costs.

Sony Xperia Z Ultra

For those who like a larger Xperia smartphone, take the Xperia Z Ultra's 6.4 inches full HD display, 8 MP rear camera, and dust and water resistances for the following promo offers:

The One Plan: Costs £38 a month with £69 upfront cost

Ultimate Internet 1000: Costs £36 a month with £69 upfront cost

Ultimate Internet 500: Costs £34 a month with £69 upfront cost

Buyers will save £30 for each Xperia Z Ultra offer from Three UK.

The Xperia Z Ultra under the Ultimate Internet 500 features 500 minutes of calls, 5,000 text messages and unlimited Internet data without any extra cost for 4G connectivity.

Sony Xperia M

Entry-level users can get the Sony Xperia M as a try-out which boasts Android 4.1 Jelly Bean, 4.0 inches of screen display, dual-core processor, 1 GB of RAM and 5 MP rear camera. Buyers can get the Sony Xperia M for the following discounted prices using Three UK's January offers:

Ultimate 500: Costs £20 a month with no upfront cost

Ultimate Internet 300: Costs £17 a month with no upfront cost.

Ultimate Internet 100: Costs £14 a month with no upfront cost

Taking advantage of Three UK's current deal offers on the Sony Xperia M will save buyers £48.

The Xperia M's Ultimate Internet 100 brings 100 minutes of calls, 5,000 text messages and unlimited Ultrafast data connection but using 3G connectivity only since the smartphone isn't 4G ready.

Promotional prices listed above are valid until Jan 31, 2014, and signing up during this time for 24 months allows people to enjoy these deals. All savings are calculated by reference to the total charges payable over the 24-month minimum term on the price plan specified and are subject to availability.