1. Create new (temporary) page.
2. This step is all on the way to Create the new temporary page, don’t get bogged down here. Click on the gear within the higher right corner, then click Create Page. Create any reasonably page, very basic, you may simply delete it as soon as Possible. select a category, name, check the box, click start. A description for your page. Click Save data. Skip following three steps. visit Edit Page, Update Page data Facebook WEB Address
3. place in any username and save. (The username is a bunch of random letters.)
4. Again, visit Edit Page, Update Page data, Facebook Web Address
5. place your current username for your personal profile there (the username you’re making an attempt to change). it’ll raise you if you wish to CHANGE USERNAME, click yes.
6. return to your personal profile and click on the gear, then Account Settings, General Account Settings, Username. you may currently be ready to modification your username!!!
7. Don’t forget to delete your temporary page. Go to page, click Edit Page, Update Page data, Settings, take away page, for good delete, Delete.
Regards : Hasan Afaque