Two of Microsoft's most awaited devices are rumored to arrive on AT&T in the United States this month.

WinSupersite said the Lumia 640 arrived last month in the U.S., exclusively in the Cricket network, while its bigger version, the 640 XL is expected to arrive in the coming weeks.

"The Microsoft Lumia 640 will be available first, possibly within the next week, and cost in the low to mid $100 dollar range. The Microsoft Lumia 640XL will arrive by the end of June and cost approximately $100 more than its sibling," added the WinSupersite report.

It was noted that the mentioned prices are for the unlocked versions of the two handsets.

Adding to these bunch of new information, Christian Post said that  the Lumia 640 became available in Cricket last month for $129.99 and is expected to be out on June 17 on T-Mobile.

The Microsoft Lumia 640 came out with a 5-inch 720 x 1280 resolution display and a pixel density of 294 ppi. It reportedly runs on a quad-core 1.2GHz Snapdragon 400 chipset and an Adreno 305 GPU. 

"Not 3GB, as what has been reported, but 1GB of RAM is inside the device along with an 8GB worth of internal storage memory. It arrives with an 8MP primary camera spec, coupled with a .9MP front snapper," added Christian Post.

Below are the other notable features of the Lumia 640 as per the Microsoft website:

- Sunlight readability enhancements 

- Lumia Color profile

- Exchangeable back cover 

- Double-tap to wake, Glance screen

- Tactile feedback

- Word flow keyboard

Meanwhile, the 640 XL has the same specifications as the 640 except that it has a larger 5.7-inch display screen, as per Christian Post. It will also have a better 13-megapixel main camera and a 5 MP secondary snapper.

Culture Mob added that the bigger handset is powered by a 1.2 GHz Snapdragon 400 processor. Its memory can be expanded to 128 GB with a microSD card and it has a 3,000 mAh battery for longer phone usage.

The second Lumia device will also have the Windows 10, which according to Culture Mob, will provide users an experience "like never before."

"The single OS will seamlessly run on computers where people use mouse and keyboard to interact with the functions. At the same time, it is fully compatible with touch screen devices as well. Soon, apps made for Android and iOS can be ported to Windows phones made possible by the developer tool kit that the company has launched," explained Culture Mob.

This major feature will surely be a factor which fans will consider in grabbing the device and experiencing it on their own. The sale of both handsets is expected to improve in the coming months because of their specifications.