Your mnemonic phrase contains the private keys and paths to all your wallets and funds. You cannot change it directly. You can always create a new Coinomi wallet (which will give you a new Recovery Passphrase) if you think that your original passphrase is in any way compromised, or for any other reason.
You will need to manually send all your funds from one wallet to another. It can be a time-consuming process if you have many different coins' wallets in Coinomi and don't have access to a trusted second device (you can always use an android emulator on your PC instead of a second device)
- I have access to a trusted second android device:
- Write down your Recovery Passphrase from your original device by going to .../Settings/Show Recovery Passphrase.
- Run Coinomi on the second device. Go though the "new wallet" procedure, backing up your new Recovery Passphrase and setting a strong password as always. Make sure both old and new phrases are correctly labeled so you don't mix them up.
- In the new device, create wallets for all the coins you are holding in your original device. *
- Send all your coins from your old device to the new one. Open the Receive tab of each of those wallets in the new device, and scan the QR code one by one with the old device. Transaction fees will incur, because these must be on-chain transactions.
- Once all your funds are transferred and visible on the second device, go to your original device, click on .../Settings/Restore Wallet, and select "Restore a Wallet" from the page that appears.
- Enter the Recovery Passphrase of the second device, set a strong password again, and add the same wallets.
- You now have all your funds in your original device, with a new Recovery Passphrase. Please don't forget to back it up safely just like you did with your original Recovery Passphrase. You can now delete Coinomi from the second device.
* If you had second and third wallets from the same coin (eg. BTC#2, ETH#2 etc) and want to keep those funds separated, you will need to manually add a second, third (and so on) wallets for these coins on the new device, and keep track of which funds should go where. Don't get mixed up, organization is key.
- I don't have access to a second android device and I can't/don't want to use emulators:
- Make sure you have your Recovery Passphrase from your device (.../Settings/Show Recovery Passphrase).
- Make a list of the coins you are holding, and if any coins have multiple wallets.
- Go to "... / Settings / Create-restore wallet / Create a new wallet" and complete the new wallet procedure. Backup your new Recovery Passphrase and set a strong password as always. Correctly label them not to mix both up.
- Consult the list you made in step 2 and create wallets for all the coins you were holding. *
- Go to each of those coins' wallets and copy their "Receive" addresses from their "Receive" screen. Use copy-paste or save images of the screen with the QR code. Make it very clear to which coin each address belongs to.
- Ensure you have a backup of your new Recovery Phrase
- Click on .../Settings/Restore Wallet, and click on "Restore a wallet" again.
- Enter your old, original Recovery Passphrase, set a strong password, and create the wallets you had again *. You should see your balances and transaction history as normal.
- Send each coin to the receive addresses you copied in step 5. Take it slow and pay attention to which coin each address belongs to. Do not send the wrong coin to an address! Wait for the transactions to confirm.
- Click on ".../Settings/Restore Wallet again", and click on "Restore a wallet" one final time
- Enter your new Recovery Passphrase from step 3, set a strong password, and add the coins you had again. *
- You now changed your passphrase. Please don't forget to back it up safely just like you did with your original Recovery Passphrase, which you can now delete/discard.
* If you had second and third wallets from the same coin (eg. BTC#2, ETH#2 etc) will need to manually add a second or third wallets on step 8 for these coins in order to see your funds. If you want to keep these funds separated on the new wallet, you will also have to add multiples on step 4 and 11.
Please note exchange and transaction history will not reflect in the new wallets. Exchange history is cleared with each Restoration (option to export it in a file before doing so will be included in one of our next releases). Transaction history for the new wallets contains only one transaction, the one broadcast when you sent your coins from the original device to the second device.