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First open your Instagram app. Second go to your profile and select the friends option. Third on the next screen tap Accept All to accept all your current follow requests. This option will also accept any future follow requests that you receive. This can be a convenient way to grow your follower count without having to manually accept each request. However you may want to exercise caution when using this option as accepting all requests means that you may end up with some spam or other undesirable followers. If you're comfortable with that possibility then accepting all follow requests can be a quick and easy way to grow your account.