If you want to buy Mid range Android Phone BlackBerry DTEK50. Here is very good offer for you i.e. You will get BlackBerry DTEK50 for Just $299 which means will save $70 now. If you really want to redeem this offer than act soon and go to B&H through the link below the article.
For Reminder, Blackberry DTEK50 features a 5.2-inch full HD display, Snapdragon 617 octa-core processor, 3GB of RAM and 16GB of internal storage which can be expandable up to 2TB. It is also packed with 13MP rear camera and 8MP front camera, 2,610mAh battery. Blackberry DTEK50 runs on the Android  6.0 Marshmallow out of the box.
The Company also claims that BlackBerry DTEK50 is one of the most secure android phone in the market at present.
See at B&H photo