Facebook mobile app is a such a worst app because it contain lots ot data and thats why I not able to use other softwere due to lack of spec available. And it also hang my mobile sometime I have to switch off it then it work properly.
There is 8 GB internal memory and 1 gb ram in my mobile. Inspite of facebook mobile app u can use facebook lite it is good app and here you don’t need to install facebook messenger here you don’t need to install facebook mssenger. Here you can chat and open you messege box without the help of messenger.