The new Microsoft Surface Pro 3 model that was launched in June has been removed from the Microsoft Store listing. At the same time, the Redmond giant is running $150 discounts for other versions of Surface Pro 3. Rumors are claiming that the Surface Pro 4 will be announced in October with advanced specs.

According to Windows Central, the Surface Pro 3 that is powered with Core i7 processor and 8GB of RAM, along with 256GB SSD that's unavailable for buying on Microsoft Store. It states that an executive from Microsoft has revealed to it that due to expositional demand, the new Surface Pro 3 model is temporarily unavailable for purchase. However, the same version is available on Best Buy, but it comes loaded with Windows 8.1 OS.

Except for the Intel Core i5 model with 4GB of RAM and Intel Core i3 versions of the Surface Pro 3, all the other models are available with a $150 discount on the Microsoft Store. According to the Thurrott blog, the Surface Pro 3 and Surface 3 that are now available for purchase come preinstalled with Windows 10 OS.

Microsoft is expected to release the Surface Pro 4 in October this year, Thurrott claimed. In July, Digitimes had reported the successor model of the Surface Pro 3 will come with the new power efficient Skylake processor. It expected to boost the battery life of the Surface Pro 4 to 10.5 hours.

It will be again sporting a 12-inch display and an enhanced Surface Pen stylus. Like the Surface Pro 3, it will be available in several processor and storage versions. The new tablet will support face recognition through the Intel RealSense 3D camera, Yibada reported.

Along with the launch of Microsoft Surface Pro 4, the Redmond giant  is expected to unveil the Microsoft Band 2 to replace the original fitness band. It may also unveil in October the new Windows 10 Mobile flagship smartphones, such as the Lumia 950 and the Lumia 950 XL.