We are currently moving the documentation to a new platform. Please visit Trezor Wiki for the latest version of this page.



What is Mycelium?

Mycelium is a mobile Bitcoin wallet for Android and iOS, although TREZOR is curently supported only on Android device.


TREZOR User Manual

Before you can start using Mycelium with your TREZOR, make sure you have an OTG cable for connecting TREZOR to your phone or tablet. Using TREZOR with Mycelium is pretty straighforward.

Importing account from TREZOR

To import a TREZOR account into Mycelium, go to Accounts tab, select Add New Account (key icon) > Advanced > TREZOR. Now, connect your TREZOR via OTG cable and confirm the access. Enter your TREZOR PIN (and also passphrase, if you have previously enabled passphrase feature) and wait until Mycelium loads all your TREZOR accounts.

Note that PIN is required only once per TREZOR connection session.

_images/mycelium01.png _images/mycelium02.png _images/mycelium03.png

Select TREZOR account the list to import it into Mycelium, give it a name and wait until Mycelium synchronizes all the transactions and balance. If you need to import more accounts, repeat the steps above. To import a new empty TREZOR account, select Import next unused account below TREZOR account list.


Without TREZOR device connected, imported accounts work in watch-only mode. You can check total balance, transaction history and display next unsused receiving address, but you cannot send any transaction.

Sending transaction from imported account

To send transaction from TREZOR account you need to connect your TREZOR. Select Send from Balance tab and enter recipient address and amount. Hit the Send button, check the transaction on TREZOR screen and confirm it.

_images/mycelium07.png _images/mycelium08.png _images/mycelium09.png

Sending transaction from TREZOR directly

You can also send transaction directly from TREZOR using Mycelium without importing it first. Simply connect your TREZOR and select Cold Storage from app menu and choose TREZOR. After Mycelium loads your TREZOR accounts, select the one you want to spend from, enter recipient address and amount and finalize the transaction by checking and confirming it on TREZOR.

Importing watch-only accounts from TREZOR Wallet

If you want to use Mycelium as a watch-only wallet for your TREZOR, you can import accounts directly from TREZOR Wallet without connecting the device.

In TREZOR Wallet, click on the name of your TREZOR and in Basic settings, click on Show XPUBs. Select account you want to import into Mycelium to reveal QR code with account public key.


In Mycelium, go to Accounts tab, select Add New Account (key icon) > Advanced > Scan and scan QR code from TREZOR Wallet to import the account. Give it a name and wait until Mycelium synchronizes it.

After that, you will be able to check balance, transaction history and display next unsused receiving address.

Properties and Features

Wallet Property Description
Platform Android
Coin(s) Bitcoin
Languages English and many others
Address Book Manage contact list of receiving and sending addresses
Labelling Add comments and labels to accounts and transactions
TREZOR Feature Description
Basic Setup   Generate new wallet with recovery seed, set PIN and label device
Safe Recovery   Recover TREZOR by safely entering your recovery seed (12, 18 or 24 words)
Simple transactions Sign transaction with TREZOR and confirm address and amount on display
Multisig transactions   Sign multisignature transaction with TREZOR
Hidden Wallets User can access hidden wallets each behind arbitrary passphrase
Multiple Accounts Capable of creating and working with multiple accounts
Smart PIN Matrix Keylogger protection, displaying PIN matrix on TREZOR’s display
Watch-only mode Remembering account, generating new receiving address with TREZOR disconected
Show on TREZOR   Phishing protection, validation receiving address on TREZOR
Change PIN   User can change TREZOR’s PIN
Change Name   User can change TREZOR’s name
Custom Homescreen   User can upload personalized default screen
Update Firmware   Notify user and update firmware when new version is available
Wipe device   Erase private keys from TREZOR
Sign Message   Securely sign short text
Verify Message   Securely verify short text
Fast Recovery   Recover by directly loading seed into TREZOR, fast but less safe way to recover wallet
Wallet Encryption   Wallet can be decrypted and opened using TREZOR only
Sign in with TREZOR   TREZOR is used for online authentication without using username and password