Hello everyone,

I am a Samsung Galaxy prevail user here and im pretty extended on diagnosing problems with my phone.
but this is the S3, its not mine and i need your help.
heres what i know and the little information i can get.
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Carrier: AT&T
Phone: Samsung galaxy S3 (world phone i think)
OS Ver: ??
it is: 4 months old.
root: NO
modified: NO
custom anything: NO
stock: YES
updated: I believe not, i did check for an update through the AT&T updating service in "settings>about phone>update" and no new update.
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the Problem:
my girl is not very techy, i dont know much about trouble shooting this phone and this is the information i got.
"the phone flickers/twitches as i scroll through the apps screen, or scroll through the main menus"
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ive asked the basic questions.
what apps were downloaded
what apps were uninstalled recently.
when did it first start.
have you been closing your apps
i have also done the following:
force closed all downloaded apps.
restarted phone.
cleared cache.
deleted most downloaded apps.
scanned for viruses using avast or something
( it was the first one and it was a recognizable logo)


what the phone gets used for?
playing games. going on facebook.
browsing websites. using GPS. used for phone calls. and messaging ( which sould be standard as it IS still a phone)
Email.

Solution:
I have none as of yet. im hoping you guys have something before i resort to

FACTORY RESET!​