November 15th, 2013, 03:34 AM
Join Date: Oct 2011
Location: Kuala Lumpur, Malaysia
Device(s): Galaxy S III, Galaxy S4, Note 2, Nexus 10, Galaxy Gear
Thanked 216 Times in 175 Posts
I never used antivirus, from what I read it has no use in Android environment. So I can't comment whether it's the cause of your lag or not.
I suspect if it's not antivir, then it's your ATT, because I use LTE32 international Unlocked and it's blasting fast.
It was always fast before the update, and even faster after it. ( I did factory reset tho).
I have turned all the Samsung features ON, connected to Galaxy Gear and to my Harman Kardon SoundSticks via Bluetooth. I have sync ON, I stream audio, run the phone at full brightness to let it consume as much power as possible, and that's how it works here:
Also, I do have few widgets which constantly update weather, calendar events etc... I can't think of other things I could add to try to make it slower.
It's been like this out of the box.