Level 0 - Blink Level 1 - Self-custodial wallet of their choice (Phoenix, Breez, Mutiny, OBW, Blixt...) Level 2 - Hardware wallet (not you Ledger) Level 2.5 - Passphrases/Multising/Shamir
And also not you Trezor.
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just dont mix with it, otherwise its fine
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