Enable Whatsapp calls activity without root

In recent update of whatsapp application it has a very great feature of calling functionality but is still available to some of the devices!

So, if you want to enable that feature to your whatsapp of android version then you can do it even if your device is not rooted!!!

This tutorial will guide you to enable calling functionality to whatsapp, just follow the easy steps.

Requirements

1. Latest Whatsapp apk (Download it from here)
2. ApkTool (Download it from here)
3. Basic knowledge of decomipling
4. Basic knowlegde of editing xml files
5. notepad++ (download it from here)

STEPS

1. Download latest version of whatsapp.apk
2. Extract the downloaded apktool.zip
3. Install notepad++
4. copy downloaded whatsapp.apk to apktool folder
   
5. Now open CMD and go to path where apktool is located
   
6. just execute "apktool d WhatsApp.apk" (without quote) and wail till process finish
7. go to newly created WhatsApp folder and open AndroidManifest.xml with notepad++
8. find
   
   <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode" android:hardwareAccelerated="false" android:name="com.whatsapp.Main"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> <category android:name="android.intent.category.MULTIWINDOW_LAUNCHER"/> </intent-filter> </activity>
   
   and change to
   
   <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode" android:hardwareAccelerated="false" android:name="com.whatsapp.Main"/>
9. Then search for this line:
   
   <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode" android:label="@string/app_name" android:launchMode="singleTask" android:name="com.whatsapp.HomeActivity" android:theme="@style/Theme.App.Home"/>
   
   Change to:
   
   <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|screenSize|smallestScreenSize|uiMode" android:label="@string/app_name" android:launchMode="singleTask" android:name="com.whatsapp.HomeActivity" android:theme="@style/Theme.App.Home"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> <category android:name="android.intent.category.MULTIWINDOW_LAUNCHER"/> </intent-filter> </activity>
   
   
10. Now compile it go to folder that contain apktool and execute "apktool b WhatsApp"(without quote)
11. your compiled apk will be situated in apktool->dist folder
12. sign the compiled apk using auto sign tool
13. Uninstall the old whatsapp
14. Install the modified apk of whatsapp
15. You are done!

Source:
http://forum.xda-developers.com/android/general/guide-enable-whatsapp-calls-activity-t3022854

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