A common question we get is "How do I log in to iCloud?". Usually iCloud login is simple but because there are various ways to login to iCloud depending on what kind of device you are on, and which iCloud service you want to log in to and use, we have listed the most common iCloud login options
Applies to iOS 6, iOS 5 (some features only), iPhone, iPad, iPod Touch, Mac computers running Mountain Lion
iCloud login from iPhone, iPod Touch, and iPad:
To log in to iCloud from any iDevice running iOS6, tap SETTINGS, then iCloud and tap Login or if you have not yet created your iCloud account, tap the button to create a new iCloud account and follow the prompts.
If you are already logged in to iCloud on one account, but would like to log out and login to iCloud using another account, scroll to the bottom of the Settings|iCloud screen and choose "Delete Account". Deleting the iCloud account will remove it from your iPhone/iPad/iPod touch and remove all of the associated data (emails, contacts, etc) from your device. It will not delete your iCloud account. After you 'delete' the iCloud account from your phone you can then login to iCloud with another iCloud account. Once you have logged in to iCloud this way your iPhone, iPad, iPod touch will have access to iCloud email, Contacts, Calendars, Reminders, Safari Shared Tabs, Notes, Passbook, photo stream, stored documents and data, Find My iPhone, as well as automatic backups of your device to iCloud. To disable any of these services from your device, just tap the on button and change it to "OFF".
To login to iCloud and access iMessages from your iPhone or other iDevice you must may have to take a few extra steps:
Tap SETTINGS, then MESSAGES
Ensure that iMessage is set to ON
If you want to automatically deliver iMessages to iPhones that are not using iCloud or when iCloud is not available to you or the recipient, make sure "Send as SMS" is ON.
Under "Send and Receive" enter any additional email address you would like to associate with your iCloud and receive iMessages at. Each email you add will have to be validated.
Set your iMessage "Caller ID", by putting a checkmark next to the phone number or email address under "Start New Conversations From".
To login to iCloud and use FaceTime you may have to take a few extra steps:
Tap SETTINGS, then FACETIME
Make sure that FaceTime is set to ON
Click Log In and enter your iCloud account and password
If you are already logged in to FaceTime with an iCloud account, and wish to use another iCloud account for Factime, tap "Apple ID", then tap "Sign Out", you can then sign-in with any other iCloud account for FaceTime. FaceTime caller ID and FaceTime "you can be reached by FaceTime at:" works the same as on iMessage described above.
iTunes App Stores:
You can use two different accounts for iCloud services (above) and the iTunes/app store. This might be useful for example if you have a child. You may want the child to have their own iMessage, FaceTime, email, etc, but use your account for purchasing apps.
Tap SETTINGS, then iTunes & App Stores
Enter the iTunes/Apple ID/iCloud account you wish to use for app purchases. If another iTunes account is already logged in, tap "Apple ID", select Sign Out, then enter the new iTunes account information.
How to login to iCloud from a Mac
On your Mac, click the Apple Logo in the far upper left of (any) screen.
Click (don't need to double click!) iCloud
Click sign in and enter your info
If you are signed in already and wish to change to another iCloud account, click Sign Out on the left, and then Sign In with the iCloud/Apple ID you wish to use.
FaceTime From your Mac:
Click the FaceTime icon or click the search magnifying glass in the upper right of any screen and type 'FaceTime', then click the FaceTime icon.
From the FaceTime menu, select Preferences
In the FaceTime window, make sure that FaceTime is set to "ON", and sign in with the iCloud or Apple ID you wish to use. To switch FaceTime to use a different iCloud account or Apple ID, click "Apple ID", then click Sign-Out, then sign in with the iCloud account you wish to use.
iMessages on your Mac:
Click the Messages icon or click the search magnifying glass in the upper right of any screen and type 'Messages', then click the Messages icon.
From the Messages menu, select Preferences
Click Sign In and enter your Apple ID or iCloud account information
If Messages is already signed in with another account, click the Sign Out button, then sign in with the iCloud or Apple ID account you want to use.
Login to iCloud from a PC:
Download and install the iCloud Control Panel from Apple (http://www.icloud.com/icloudcontrolpanel)
After installing the iCloud Control Panel activate iCloud by clicking 'iCloud Control Panel' in your Start Menu.
Enter the iCloud/Apple ID you wish to use
Activate the iCloud options you wish to use (Mail, Shared Bookmarks, Photo Stream)
Get iCloud Notes, Reminders, Contacts, Calendars, eMail and Find My iPhone on a PC (basic operations)
To access Notes, Reminders, Contacts, Calendars, email and Find My iPhone on a PC, go to www.icloud.com and sign-in with your iCloud id.
Use FaceTime and iMessages on a Windows PC
FaceTime and iMessages is only available on Mac OSX, iPhone, iPad, and iPod Touch.
iCloud login with two accounts:
For more detail on how to sign into iCloud with two iCloud accounts see this page: iCloud Logon with two iCloud accounts