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If we say in general terms then you should try to regain account recovery access and then you can update your number. Or you can follow the below steps:
This is how, you can solve this issue by following this procedure properly. But if still after following these steps, you are can’t login to tinder account then contact the Tinder customer support team. Now, the question that would be popping up in your mind is “how can I contact the customer support team of Tinder?” Here is the answer.