Generally there are no hanging issues in any phone. Keep your RAM free by closing unnecessary apps running in the background. I have Samsung Galaxy J2 2015 and coz it has only 1GB RAM , I need to force stop apps to keep it running smooth.
I am using this phone and it has average camera performance in night . Photos will be grainy. First I thought i have defect in my phone but its same for everyone . check its review on 91mobiles . They have similar grainy picture in night.