So, In late 2017 many phones launched with dual camera setup which have portrait mode in it which intelligently blur the background and gives a DSLR like photos.
If you don’t have those big budget phones for portrait mode. Don’t worry Here is how you can capture portrait mode photos on any Android phone.You just need to install one camera app, you can find the link at bottom to download.
In this camera app when you slide your finger to ride you get many options, Now select Lens Blur option. Here in this option you have to click the shutter button and move your device upward slowly. After capturing it will take some time for processing and rendering the image. And Boom!!! Here you get your portrait mode photo. This feature works on both rear and front camera. For perfect shots you have to move your device slowly upward and the light should be enough to capture the images.
Here are some samples taken on Redmi 4 with help of this app.
Download Here : Camera