Hi @Tina Wong
Welcome to the Atlassian community.
Do you mean the mobile Trello app wasn’t installed in your new phone during the transfer?
If that’s the case, you could just install the mobile app from the app store. All of your data (boards, cards, file attachments, etc) is associated to your Trello account, which means you can access it by logging into your account (either through the browser website or through the mobile app).
Cheers,
Hamza
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