::
>1.) If I use my recovery seed from my Trezor 1 to add my coins to the new T what happens to the Trezor one? Is it still active and can it still access my coins?
It sill works fine. It’s like having a copy of your house key. Both keys open the door.
​
>2.) And if I add a passphrase to my Trezor T do I need to use that passphrase on my T-1?
If you want access to the same wallet, then yes. A wallet = seed phrase + passphrase
​
>3.) I understand I can create multiple hidden accounts using different passphrases. Is the original seed phrase still needed to recovery each account along with the Passphrase?
Yes. If you lose the seed phrase, funds are lost. If you lose the passphrase, funds are lost. You MUST have both.