Following RIM CEO Thorsten Heins’ recent announcement that his firm has two handsets ready for the launch of its upcoming BB10 platform, the company has supplied app developers with details of the screen resolutions to feature on the devices.

The move will allow developers already working within the platform to configure their apps so that they are ready for the expected release of the new operating system in early 2013.

BB10’s full touchscreen device will have a display with a resolution of 1280×768 pixels – the same as the Dev Alpha handset given out to developers at BlackBerry World in May. However, future full touchscreen BB10 devices will see a 1280×720 resolution introduced.

The implications of the move for developers is that apps created for platform’s release will need to be reconfigured for later BlackBerry models.

Heins has also stated that one of the two BB10 launch devices will have a trademark BlackBerry physical QWERTY keypad. RIM has now confirmed that all of the new platform’s physical keypad handsets will have a resolution of 720×720 pixels and while this standardises much of the upcoming BlackBerry hardware it means that developers will have to alter their apps further to suit these devices.

Elsewhere, RIM has had some disappointing news in the US, with its market share in the country reported to have fallen to around 1%. Research undertaken by advert network Chitika found that there has been a 25% decline in mobile traffic from BlackBerry devices over an eleven month period from September 2011 to July 2012.

At the beginning of that period RIM could claim a 5% share of US mobile use, but this has since slumped to a figure just over the 1% mark.