After about one month of testing, the much-awaited Instagram multiple accounts feature is finally live for Android and iOS. The announcement for the same was made by the Instagram team via an official blog post. The new feature will be rolled out via an update which will bump up the app version to 7.15 on both Android and iOS platform.
When you have received the update, you will be able to add multiple Instagram accounts (up to 5 accounts) by going to Settings and using the option Add Account. If you want to switch between the added accounts, you can do easily by going to Profile tab and tapping on the username in the top left corner.
As mentioned above, the testing of the feature was started by Instagram on Android last month. It was then followed by a testing on iOS platform. The update is getting rolled out in phases and you should receive it soon if you have not yet.