When someone's calling it's slow to come up, maybe 5 sec till it responds. it just rings on the lock screen or a blank screen.
emails take a while to load. 5gb gmail inbox and a mfe account.
medias take a while to load. about 17gb of music and 4gb of videos/pics, i dont even use it as a music player anymore. id like to move on to spotify
lack of mms. fmms is ok but when i get mass texts from android and ios it sends it as individual mms.
slow browser speed. even tried using google's dns.
biggest gripe is google calendar sync. it just doesn't work. and 3rd party software can be a clunky work around. ie manual syncing