Nokia continues to improve on its Lumia sales figures worldwide. The latest Q2 earnings show another quarterly improvement, up to 7.4 million in the latest quarter. That's a bump on the record high of 5.6 million in the last quarter, and up from 4 million in the same quarter last year. Up to June 30th, Nokia has sold 27.3 million Lumias in total since shipping its first Windows Phone device, the Lumia 800, in November 2011.

North American device sales improved from the previous quarter, but only reached 500,000 shipped in total during Q2, a 16 percent decrease year-on-year. Nokia previously shipped 400,000 devices in North America during the previous quarter. Although Lumia shipments are clearly improving in the rest of the world, the US sales are lagging behind. Nokia's "rolling thunder" approach to the US has been a slow and bumpy so far, with dips and increases over the lifetime of North American Lumia sales. Nokia introduced its budget Lumia 521 on April 27th in the US, and its Verizon flagship, the Lumia 928, on May 16th. Although neither device saw a full quarter of sales, it looks like initial demand hasn't helped boost Nokia's efforts in the US.

Nokia's Lumia 520 may have helped

Average selling price for Nokia's smart devices comes in at 157 euros, a four percent increase from the same quarter last year when it was 151 euros. Last year's mix included Nokia and Symbian devices, but this year Nokia is only counting Lumia sales. The average selling price has dropped by 18 percent quarter-on-quarter though, suggesting that Nokia's low-end Windows Phones are starting to sell. This is partly backed up by data from Adduplex, a firm that measures the usage statistics of Windows Phones. Adduplex claims Nokia's Lumia 520 is the most popular Windows Phone worldwide, despite less than three months worth of sales.

Looking ahead, Nokia CEO Stephen Elop believes that "new Lumia products will drive a significant part of our Smart Devices revenue" next quarter. Nokia recently unveiled its Lumia 1020 Windows Phone, complete with a 41-megapixel camera. The handset will debut on AT&T on July 26th. Priced at $299, above similar smartphone competition, if it resonates well with consumers then it could indeed contribute to improved revenue next quarter. Nokia introduced the Lumia 925 on T-Mobile earlier this month, so it will be reporting some of those sales next quarter. Nokia will also have a full quarter of Lumia 521 and Lumia 928 sales to report.