At kitkat the mobile didnt had any memory issue.and the kitkat interface was much handy But wen I updated to Lollipop free space for Apps installation really got low.wen I tried to download new apps from play store it always showed No sufficient memmory.actually the problem was with google play services app which consumed 107MB memory.I had to reset my mobile after disableing useless apps etc.etc I got free memory for apps 400MB.quite OK.
Unite 2 Kitkat users before u upgrade to Lollipop Better think twice.so Before u update to Lollipop resetting ur mobile is highly recommended.
One main drawback of Lollipop update is Device will loose capacity of moving apps to external SD Card, and you have to store apps either in phone memory or internal SD Card. . This will cause a lot of memory problem.
Really Lollipop update for 4GB internal storage(available 1.5GB) Micromax unite 2 is a NIGHTMARE.!