The Blu Win Jr has one of the worst cameras I’ve seen on a Smartphone made in the last 6 years. The front camera is somehow even worse than that. The camera requires the utmost care to get images that are acceptable and may not even be useful in an emergency.
The main camera on the Blu Studio 5.0 II is passable. It’ll get the job done in daylight, but don’t expect anything near top tier smartphones. The secondary camera is low resolution, more of a web cam than a selfie cam.