Some text messages not received

[Pythagoras]

For couple of days I have not received text messages for 2-Factor Authentication sent from two different banks (I have made no changes to anything at all for years). But I am still receiving (at least some) text messages from private individuals. What is going wrong?

[Pythagoras]

Just to add to my message above: I find that I am also  not receiving SMS message from a third bank. And I have again confirmed that I can receive an SMS sent from an O2 phone in the neighbourhood. (I have rebooted my [Android] phone, and I have checked that there is nothing in the SMS  "Spam and blocked" folder.)

[jonsie · Accepted solution]

Try the tips here

Guide: Text Message Tips (not sent or received) 

We’re just customers like you but it sounds like you’ll need someone to access your account which can’t be done from here. If you message O2 using the links below, they should be able to help you with this