There is a buzz on TechCrunch about guest mode on smart phones. For jailbroken iPhone, iPad and iPod Touch owners there is a good news, they can setup multiple user accounts on their iOS devices.
Multiple user accounts can be configured through iUsers. This utility was actually designed for iPad but you can get it working on other iDevices too. iUsers can be installed through Cydia by adding sources.
To install iUsers go to Cydia > Manage > Sources > Edit Button > Add Button and write http://cydia.iblogeeks.com and tap add Source, after adding this repository wait for reloading and than go to Search tab and search for iUsers and install it. After installation you will be prompted to restart Springboard. After Springboard restart you will be asked for setting up multiple user accounts, setup your primary user account and than go to Menu > Settings > iUsers where you will be able to add multiple user accounts to your iDevice. After all this setup lock your phone and when unlocking it you will see user accounts in slide to unlock tab.
You wont be able to read user account names in iPhone and iPod as this hack is mainly designed for iPad which have bigger screen and high resolution but still you will be able to select between user accounts. See following lifehacker’s video for details.