What should I do before selling my old phone?

Sign out of your account, remove the SIM, factory reset. The sign-out matters: activation locks survive resets.

Why did my banking app not transfer?

Banking and 2FA apps bind to the device on purpose. Each has a re-registration flow; run it while both phones live.

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Set up a new phone the right way

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Back up the old phone first.

Full cloud or cable backup, verified, before the new box opens. The transfer eats the backup, not the phone.
Use the official migration path.

Quick Start, or the transfer cable and app. It moves apps, photos and most logins in one supervised session.
Reauthenticate the critical apps.

Banking and authenticator apps often need manual re-setup. Do these first while the old phone still works.
Move the authenticator explicitly.

Two-factor apps have their own export. Skipping this step is the classic lockout story.
Wipe the old phone last.

Only after a week of the new one working: sign out of the account, factory reset, then sell or drawer it.

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Sign out of your account, remove the SIM, factory reset. The sign-out matters: activation locks survive resets.
Banking and 2FA apps bind to the device on purpose. Each has a re-registration flow; run it while both phones live.

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new phone setup checklist · transfer data new phone · switch phones what to do · old phone before selling · migrate to new phone +185 phrasings, one home