I too have OTPs being sent to my old mobile number. I have checked all the settings, and they are correct in showing my new number. I have to verify a different way. (I tried geting a call to my Landline and that method failed!) I have to use my stored secure information to verify who I am. I have tried contacting PayPal and have got nowhere. I now do not use PayPal for transactions! Come on Paypal, sort it out!
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