Samsung Galaxy S5: How to Use Call Forwarding in Android 4.4.2 Kitkat

Since call forwarding is a basic feature therefore most of phones usually have this feature, including with Samsung Galaxy S5. Call forwarding itself is a feature that will let you to divert some or all of incoming calls to another number. By using this feature, you can set your phone to always forward all incoming calls or only forward them when the certain condition is fulfilled (e.g: when busy, unanswered or unreachable). You can choose which call forwarding option you want to enable based on your need, for instance when you're in an out of coverage area then you can enable call forwarding to forward incoming calls to another phone number so that you won't miss any important call.

How to use call forwarding feature?
You can do so by using the following steps:

1. Open Phone app.
2. Tap or long press the Recent apps key to open up the additional options and then select Settings.
3. Tap Call.
4. Tap More settings.
5. Tap Call forwarding.
6. Tap Voice call and then select from the following options:
• Always forward: select this option to forward all incoming calls. FYI, if you select this option, you'll see is displayed on the status bar as a sign that all incoming calls will be forwarded and other call forward options will be disabled.
• Forward when busy: select this option to forward incoming calls when your number is busy.
• Forward when unanswered: select this option to forward incoming calls when unanswered.
• Forward when unreachable: select this option to forward incoming calls when the phone is turned off or when your number is unreachable.
7. Soon after selecting a call forwarding option (e.g: Forward when unreachable), enter the alternative number you want the incoming calls to be forwarded to or tap to select the required one from the Contacts app and then tap Enable button. 
8. If you didn't choose always forward, you can enable other call forwarding options by repeating from the step #6.
9. To disable call forwarding, tap the required call forwarding option you want to disable (e.g: Forward when unreachable) and then tap Disable button.

As a note, if you don't have call forwarding option in your phone(in some models, some options/features may be disabled or unavailable) then alternatively you can enable or disable call forwarding via text message or by dialing a specific code. You can get the message format or the code to enable or disable call forwarding from your service provider.