How to decouple the room from the "Vkontakte"
For example, in social network "Vkontakte" in order to loose the number, you need to log into your account using your username and password and then go to "Settings". Next, you must open the Alerts tab and check whether the linked e-mail account or not (must be filled field "E-mail alerts"). If this is not done, then detach the mobile phone number simply will not work. After the user enters E-mail and confirm it, you need to click on the link http://vk.com/deact.php. In the field "Mobile phone" should indicate the number that need to get rid of page in the social network and click on "Send code". Once the code comes to mobile, it is necessary to enter in the corresponding field and confirm the operation with the button "Disable alerts". This entire process is completed, but after that, the user will receive alerts about binding the new rooms.
How to decouple a room in the "Classmates"
In a social network "Schoolmates" it is a bit complicated. In order to remove your phone number, you must first remove your page from the social network and wait three months, after which again there is a possibility to register (only for those who want to re-bind the same number to the page). So the whole procedure involves the removal of the page, unfortunately, to accomplish what you want on the other does not. In order to delete a page in the "Classmates", you must go to the bottom of the page and find the item "Rules". Clicking on the link, a new window will appear where you have to find another link, which is also located at the very bottom and click on "Withdraw from services". This will open a special menu in which to specify the reason for removing the page, enter your password and click on the "Delete" button. After 3 months the mobile phone number is automatically removed from the database.