How can i change the profile picture ? Tell me please!
Welcome to PF!
I think you have to become a gold member to get that feature.
Also there's this route:
That restriction was removed some time ago.
To change your avatar (profile picture), click on "My PF" at the top of any page, then choose "Avatar" from the drop-down menu.
[added] This is for the web site, as seen in a web browser. If you're using the app, I don't know how to do it there because I don't use the app.
And Naseeb, in the future you can help us help you by saying something about what your question is about, in the title of your post, instead of simply "Help!" I have edited the title for you, just this once.
Separate names with a comma.