Cobo Vault firmware versions V2.3.0(Multi-coin) & V2.3.1(BTC-Only) support constructing your very own recovery phrase. Users can select the first 23 words from the official list of 2048 words(Github). Cobo Vault will calculate the 24th word.
1. This is an advanced feature. It’s not recommended for crypto newbies.
2. Please make sure the approach that you select the first 23 words with is random enough. e.g. Printing all the 2048 words on a piece of paper, and then using a pen to blindly spot 23 words randomly, is considered insufficient and will surely lead to the loss of your funds. The methods mentioned here https://btcguide.github.io/setup-wallets/paper can be used as references.
3. The algorithm implementation of how Cobo Vault calculate the 24th word is the same as in https://seedpicker.net/calculator/last-word.html, so users can verify the result with seedpicker.
1. Cobo Vault Essential or Pro upgraded to firmware version V2.3.0/V2.3.1 (BTC-Only) or later
1. Find the interface that gives you the options to either [Import Vault] or [Create Vault].
1) You can find this interface during initialization of the device. If you have already initialized your device, go to the step below.
2) You can also enter this interface by going to [Settings], then touching [Create/Import Vault]. (CAUTION: The new recovery phrase will erase and replace your current recovery phrase. Make sure you have properly recorded your recovery phrase before you proceed with generating a new one.)
2. Select [I’ve read…] and touch [Create Vault].
3. Continually and quickly tap the top right corner of the “Generate Recovery Phrase” page for 3 times. Touch [Create your Recovery Phrase] and get into the hidden function page. Touch [Fill in your 23 words].
4. Please make sure the approach that you select the first 23 words with is random enough and then fill it in. Touch [Calculate the 24th Word]. Choose a word as the 24th word and touch [Confirm > I UNDERSTAND].
5. Backup the complete 24 recovery phrase and click [Recovery Phrase Saved > Next Step].
6. Enter the backuped recovery phrase and touch [Confirm]. The Cobo Vault will now start the wallet creation process.