[Samsung Galaxy Grand Quattro] id74em8:
^^ Um, yes, I took it from Him.

And it works on TouchWiz, Just so you know.

Okay guys, we can work with multiple users on this device.

Before we begin, here's what you need:

1- Root access granted

2- Terminal Emulator [from Google play] OR adb enabled

3- Busybox installed [increases the range of commands accepted by the emulator]

Now open Terminal Emulator, and type these codes to see the maximum users allowed

It would show nothing.

To change the maximum users allowed, type

Mine is 4.

To create a user, type

To remove a user, type

NOTE:- the primary user number is 0. The users you have created would have numbers from 1 and onwards.

If you want to change the user names after creation, go to /data/system/users/userX.xml

here X is the user number, from 0 and onwards.

0 is the primary user.

SECURITY NOTE:

The second user can still access your messages, contacts, etc. It's best if you set a lock screen password on your own user, and select another launcher for the second user, hide all the sensitive applications using some application hider.

If you are on the second user, most of the data from the primary user is hidden (you can not acces it).

For example:

- photos

- unlocked levels in Angry Birds

- music

- contacts

- google account

- clipboard

- home screen

But there are a few exceptions:

- all the apps are there, as if they were just installed

- the recent apps menu

- the use-app-as-default-setting (I don't know the official name). For example: if you set Apex as default in the Guest account, it will also be default in the primary account.

- your messages!!

Original Method for 4.1 below:

Been featured on the below sites!

XDA Portal

http://www.xda-developers.com/android/switch-user-profiles-on-jelly-bean/

XDA TV

http://www.youtube.com/watch?v=MLdt973MToM&feature=youtube_gdata_player

Phandroid

http://phandroid.com/2012/08/02/and...but-confirmed-for-future-versions-of-android/

The Verge

http://theverge.com/2012/8/2/3216403/android-multi-user-feature-shown-off-developers-video

AndroidCommunity

http://androidcommunity.com/multi-u...ndroid-tweaks-enabled-in-jelly-bean-20120802/

Android Central

http://androidcentral.com.feedsport...s0Edefinitely0Enot0Efinished0Eyet/story01.htm

Slashgear

http://www.slashgear.com/android-multi-user-support-uncovered-in-jelly-bean-02241519/

OS News

http://www.osnews.com/story/26244/Android_4_1_has_rudimentary_multiuser_support

Phone Arena

http://www.phonearena.com/news/How-...unts-on-a-Jelly-Bean-device-right-now_id33001

Android Headlines

http://androidheadlines.com/2012/08...-multi-user-accounts-in-jelly-bean-video.html

PhoneDog

http://www.phonedog.com/2012/08/03/...r-accounts-on-android-was-a-long-time-coming/

Boxden(?)

http://slumz.boxden.com/f244/androi...-but-confirmed-future-versions-andro-1793277/

Geeky Gadgets

http://www.geeky-gadgets.com/androi...ple-user-accounts-in-action-video-03-08-2012/

DroidDog

http://www.droiddog.com/android-blog/2012/08/root-set-up-user-profiles-in-jelly-bean/

Pocket Droid

http://www.pocketdroid.net/simple-multiuser-environment-hidden-android-41-jellybean/

SCREENSHOTS:

1- created maximum users

2,3- created new user TEST

4- home screen of new user TEST

5,6- removed user TEST (user #1) (primary is #0)