Since last year, some Instagram users are able to enjoy multiple accounts logged into a single app. With the news 7.15 update released, Instagram rolls out account switching to all.
Having multiple accounts logged in will benefit those who have a couple of IG accounts used as personal or for business. To add an additional account, go to settings, scroll down, and choose Add Account. To switch, just tap your username at the top of the screen when in your profile and choose which account to use. Keep in mind that you can only add up to 5 accounts.
To have the said feature, all you have to do is update to the latest version of Instagram, which is 7.15. This is available on both major mobile platforms of iOS and Android. Just head to the App Store or Play Store and hit update.
it is not working in my phone even after re-installing