CloudSend are whatsapp apps That is used for sending any type of file through any messenger but it is used extensively for android.But for this app to work You need to have dropbox installed on your android.the link of both the apps are given below just download it and install it. From Below :- 

1. Download  Dropbox      Here
2 Download  CloudSend   Here

* After Installing  Dropbox and CloudSend on your Android device Open Cloudsend and start setup.

                      


* CloudSend will ask you to link it with your Dropbox account. Without any hassle, allow it.

* Now you have completely setup the sharing process.

* Now Navigate to the file you wish to share with your friends.

* Long tap on the file and chose share option. Share it with CloudSend.

 

















  * CloudSend will upload the selected file on Dropbox. Wait for the upload process.    

   * As soon as upload completes, you’ll get the notification on the notification panel. This 
       notificationis containing the sharing link.

   *Press the notification and you’ll be prompted to share file link via option. Share it via WhatsApp or any other messaging client with the person you wish to share the file with.

Ya its possible!!.but only on your own phone so you can troll them by using it.

This is how you do it

-Step 1. Choose a picture for your friend which you want to replace with your friend profile pic and download it.

-Step2. Now Rename the Image with your Friends Mobile Number. For example , i will change it to 98611****** of my friend .

-Step3.Resize the image to 561 * 561 using paint by following these steps:

- Right Click the image and "Open With">Paint
- Press Ctrl + W and check "by Pixels"
- Set the values to 561 Height and 561 Width
- Ctrl + S to Save it.
-Step 4. now just save the image into your device on the path “/sdcard/WhatsApp/Profile Pictures”.

-Step 5. Turn of Wifi or Deactivate data network for a while.(till you prank your friend). as his real profile picture will not Download then

Step 6: Show and Appreciate him for his new profile picture by showing him or say you have his whatsapp hack

(Note :- Its Not a hack but just a prank to fool ur freiends.)00000