I have about 1.5 gb of free space, my phone is lagging, I've tried restarting with no avail. Any suggestions to improve my phone's performance?
Could you provide a little more information like what your running? Social media, email sync's, widgets, 3rd party launchers, etc. It all adds up eventually.
Also is your device updated to 4.4.x or have you avoided the updates and still running 4.3.3 or lower?