Nokia has unveiled a 4G-capable tablet running Windows RT, as well as the Lumia 1520 and 1320 smartphones, which both have a 6 inch display.

The 10.1 inch Nokia 2520 tablet will compete directly with new-owner Microsofts Surface tablets and run on the same OS, which has struggled to gain users or support from manufacturers. Microsoft was shifting around 20,000 devices per day in Q4 last year, compared to the 250,000 being sold each day by Apple.

The $499 (£309) tablet has an optional 4G SIM slot and an ARM-based chip set, meaning it outperforms the new Surface 2 in terms of connectivity and battery life. And it costs less. As usual, Nokia has opted for a range of colours – red, white, cyan and black.

The 1520 smartphone will start shipping this quarter with a $749 price tag, while the 1320 is priced at $339. For handsets, Nokia has unveiled Beamer, letting users stream content from their phones display onto a separate screen, as well as a photo app that lets users refocus photos after theyve been taken. It has also combined NFC and Bluetooth 4.0 in its new treasure tag technology.

At the last Nokia World event before the company finalises the sale of its hardware division to Microsoft, Nokia also added three models to its Asha range of low-end handsets, running on the companys Series 40 OS. The Asha 530, the most expensive unveiled today, is the first to support 3G.

Forrester Analyst Thomas Husson said: “Nokias challenge is not so much in its ability to deliver qualitative new product experiences but more in the overall brand perception – especially when entering a brand-new market like tablets. Despite a more affordable price, the respective positioning of Nokias new tablet versus the Surface 2 is not obvious and will have to be dealt with post Nokias acquisition.

“These new devices will help Microsoft get traction in net new Windows acquisitions, but were still far removed from a significant installed base of consumers that it will naturally attract mainstream marketers and third parties.”