if the installations and begins and shortly it still display an error message(Need free space)then you left with no choice as too download the few remaining apps and proceed by turning off your phone.on it back and enter File setting and refresh,get back to update page and proceed with your download.

Easy if you had already deleted several apps,then simply turn off your phone and on it again.go to phone memory(Generally called 'File' and tap on Refresh you will notice your have an extra space now in your phone.Go back to phone settings and start the download(it works)N/B make sure while your download start,your mobile should have a better percentage of above 40 else the installation will not proceed until the battery is atleast 40% charge.