People using smartphone running old Android version i.e Gingerbread may have difficulty in multitasking on their Android device, there are lots of apps that promise multitasking for low end phones but requires root. The good news is, there is an app i found that doesn't requires root, very light in size and hardly consumes phone RAM.
Multitasking is an Android app that offers real time multitasking with minimize and maximize support, it doesn't lag and consume battery. Am currently using it on my phone and i know you'll like it too. Found out more about it and its download link from here newbielink:http://www.ccnworldtech.ml/2014/12/multitask-how-to-run-multiple-apps-at.html [nonactive]