| Microsoft | Nov-10 | Dec-10 | Jan-11 | Feb-11 | Mar-11 | Apr-11 | May-11 | June-11 |
| US installed base | 9 | 8.4 | 8 | 7.7 | 7.5 | 6.7 | 5.8 | 5.8 |
| Percent loss | 0.7 | 0.6 | 0.4 | 0.3 | 0.2 | 0.8 | 0.9 | 0 |
Comscore have released their monthly US smartphone subscriber numbers and for the first time in a long time it did not show a decline in the number of people using phones running Windows Mobile and Windows Phone 7.
The news may herald the long awaited point at which the number of Windows Mobile users who convert to other mobile operating systems like iPhone and Android is exceeded by the number of new Windows Phone 7 owners.
The achievement is in the face of a rapidly growing smartphone market itself, which grew 8% over the last 3 months in USA, meaning the combined total of Windows Mobile and Windows Phone 7 users did not just remains static, but last month in fact grew at the same rate as the overall market did, around 2%.
Over the same period Android climbed 2%, while Apple also remained stable at 26.6%. RIM on the other hand fell 1.3% and Palm 0.2%.
If this the long awaited turn around? We shall find out next month.
Via Winrumors.com