Last month research firm comScore reported that Microsoft had seen an ever-so-slight uptick in market share between March and April 2012. The positive trend continues in their latest figures for May 2012 which have just been published to the web.

Microsoft's mobile market share increased to 4.0%, which is the first time in a long time that the three-month-average from comScore's data has been a positive value. However, it appears Windows Phone has only inched forward because their April average was also 4.0% which means there was little to no growth (relative to the rest of the market).

We'll see if Windows Phone continues to grow while AT&T pushes the Nokia Lumia 900 for a few more weeks, but something tells us there won't be much change until later this year.

Source: comScore