Receive access code Government Gateway

Dear sirs, For the Government Gateway, user can set three ways to receive access code(sms, voice call and authenticator). Q1. Can I set both sms and voice call with same phone number? Q2. Can I set two ways with SMS(different phone number)? Q3. Is one of the way(SMS or Voice call) must use Tax Return record phone number/Government Gateway record phone number/National Insurance# record phone number? Thanks.

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