This seems to be a new security measurement from Instagram, this is the announcement from Massplanner:
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Just found a very important thing about Instagram and thought of letting you know. Lately we have received some emails from you guys saying that MP is showing Phone Validation when in fact it seems that IG has deactivated that account (
www . instagram . com / username does not show the account). It seems that this is just a new security check implemented by Instagram. When this happens in order to recover your accounts you will need to login from a mobile device using the same proxy that you have in MP. IG will ask you to verify your account via a mobile number and after that the account will be reactivated. I think you can do this via bluestacks or other mobile emulation software (havent tried it, but could work).
Please let us know what works and what doesnt work for you in order to help each other.
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