OLH-3718 remove international numbers UI#2761
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jeremy-barrass-gov merged 56 commits intomainfrom Feb 24, 2026
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…phone-number-page [OLH-3720] update mobile phone number page
jeremy-barrass-gov
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TaherKapasi,
danacotoran,
liegeandlief and
martin-gwar
TaherKapasi
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Feb 23, 2026
SyedAlam83
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Feb 24, 2026
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Testing completed, no issues found
danacotoran
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Feb 24, 2026
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Hi @jeremy-barrass-gov this looks great.
Assuming that this has been reviewed and approved by the UCD team in terms of UI and content design already, I have only done a code review as part of which I spotted a couple very minor things that could be tweaked (as outlined in inline comments – it's basically all to do with styling on <a> elements).
Let me know if anything is unclear.
Happy to approve once resolved!
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danacotoran
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Proposed changes
OLH-3720 Update Change Phone Number journey: https://govukverify.atlassian.net/browse/OLH-3720?atlOrigin=eyJpIjoiMDQ5Mjg3MDZmMWU0NGY2ZjgzYjhiZGI2YjM3ZjA2MWUiLCJwIjoiaiJ9
OLH-3722 Update Change Default Method journy: https://govukverify.atlassian.net/browse/OLH-3722?atlOrigin=eyJpIjoiYTQyZDE5MDk1MjhjNDgwMDljMWYwODE1MDkwZTUzOTIiLCJwIjoiaiJ9
OLH-3723 Update Add Back-up Method journey: https://govukverify.atlassian.net/browse/OLH-3723?atlOrigin=eyJpIjoiZGFkZjY3YzhkODRjNDFkMmExZGNkZTM5Y2I5OWZiZGUiLCJwIjoiaiJ9
Remove the ability in the UI for users to add an international phone number to their MFA Authentication methods.
What changed
Any UI elements mentioning international phone numbers were removed.
UI elements were updated to ensure UK phone numbers only is explicit.
Information regarding UK phone numbers only was added.
Information regarding setting up and using an authenticator app was added.
Error messages were updated.
Any logic (except for phone number validation) pertaining to international numbers was removed.
Why did it change
Because we no longer support international phone numbers for SMS MFA, due to this being exploited financially by bad actors adding premium rate international phone numbers to an account, then spamming the account with login attempts to generate texts (and revenue) to that number.
Related links
#2731
Checklists
Environment variables or secrets
Testing
Fully unit and feature tested.
Sign-offs
N/A
Monitoring
How to review
I've run through the journeys locally and run automated unit testing and feature testing. I will deploy this branch to Dev imminently for UCD testing.