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2FA methods supported by Three [UK]
Three [UK] offers the following two-factor authentication options to help protect your account.
SMS
Three [UK] can send a one-time verification code to your phone via text message.
Three [UK] 2FA — Frequently asked questions
Does Three [UK] support an authenticator app?
No. Three [UK] does not currently offer TOTP-based codes, but it does support SMS.
Which two-factor authentication methods does Three [UK] support?
Three [UK] currently supports: SMS.
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