hash key not recognised for authorisation

[Ardrethol]

Hi. Have tried to sign into my NS&I account but unable to because I need to use the # key to enable authorisation & it isn’t being recognised. Advisors at NS&I have informed me this is a common problem on iPhones & the cause is the “DTMS files”? on the network. Have now been locked out of my account - very annoyed!! Can you enlighten me? Thankyou

[Enlli]

Can't for the life of me think it would be an O2 problem as we would have had many complaints here.

Try updating your carrier settings. If that does not work try searching on Apple / iPhone forums