How to enlarge facebook locked profile photo whithout knwoing anyone

 

Have you ever amazed that some people locked there profile photo so that no one can see them without their permission. But there is several ways by which you can enlarge that photo so that you can the photo clearly and other benefit of this is that no know that you have seen their profile photo without knowing them. This is  not hacking but clever use of Internet.
There are some point which you have to follow are given below.

1.  Visit Facebook and open your account.
2. Now open someones profile who have locked there profile photo.
3. Right click on that profile pics and click on copy image location. 

4. Now get url of that image and past that link in address bar of your browser.
https://fbcdn-profile-a.akamaihd.net/hprofile-ak-prn1/t1.0-1/c18.18.221.221/s160x160/63911_1393104127577755_2120187500_n.jpg
5. You have to remove
   s160X160/
6. You are at the last step of this Trick. 
7. Now change this code
   s160x160/
     with new code 
s720x720/
8. Now you have change link, Go to the browser and past that link and you are done you got the large photo.