Since Coinomi is an HD wallet, all you need as a backup is your Recovery Phrase. That simple list of words backs up all transaction histories and balances for all coins. You can review it by going to "... / Settings / Show recovery phrase". Below is an example of recovery phrase, and the order in which the words must be used.
Note all the warning messages and requirement to say you stored the phrase in a safe place. It's essential that users keep a proper backup of their phrases and never share it with anyone. This can never be emphasized enough.
If you ever lose or change phones, simply reinstall Coinomi and choose the option "restore a wallet" and input all words in order. Make sure all characters are typed in lowercase and that there is a single space between each word. Type the first 3 or 4 letters of each word and select the suggestion that pops up to avoid misspellings.
Upon restoring and adding the wallets back, your balances should be immediately visible after a refresh from our servers. If you have any problems after restoring, you can check our guide: "I restored my wallet using the correct passphrase but I don't see my funds". Some non-essential information is not backed up, like address book and exchange history. Full backup is coming in a future update.
It is essential that you have a backup of the recovery phrase and keep it stored somewhere safe and private. If anything happens to your device, it is the only thing that can restore access to your funds. Anyone who has access to it is able to move the coins without your permission. We do not have access to your phrase, never have and never will.
If you didn't have a backup and something happened to your device where you can't open the app, your funds may still be recoverable if you have all of the following: a) access to your device b) Coinomi has not been deleted c) you remember your password. In this case, please contact our support.
Recovery Phrase Safety
✅ You can write it down on paper or durable material and keep it in a fireproof vault.
✅ You can store it digitally in an encrypted file protected by a strong password.
✅ If you decide to store it digitally, it pays to be extra careful and use a clean device that was never online.
❌ Do not keep it on the same phone where Coinomi is installed. If you lose the phone, you lose everything.
❌ Do not store it digitally in plain text (or plain image), specially on cloud services.
❌ Do not leave it where other people can see it. Never share it with anyone, not even us.
⚠️ For security, your Recovery Phrase is never transmitted out of your device. If you lose it, we cannot retrieve it!
⚠️ If you ever set a BIP39 passphrase (unrelated to your app password), it must also be backed up and used when restoring.
Error Messages During Restoration
Error Message 1: "Could not verify your recovery phrase. Word list size must be multiples of three words."
Solution: A recovery phrase can only be 3, 6, 9, 12, 15, 18, 21, or 24 words long with a single space between each. Check that there is a single space between each word. Make sure that you have not repeated or forgotten any words in your recovery phrase. If you wrote down a recovery phrase that is not of this length, you may have created your phrase with an additional BIP39 password. If this is the case, check the box "Use a BIP39 passphrase" and enter your extra password(s). (Note that by default Coinomi creates wallets without a BIP39 passphrase)
Error Message 2: "Recovery phrase contains unrecognized words."
Solution: This error means that at least one of the words in your phrase is not in the official list of supported words, or you may have an uppercase character. Make sure all characters are in lowercase first. Then you can test your phrase here as it tells you which word is unrecognized. You can also see the full list of supported words here.
Error message 3: "Recovery phrase is not valid. Check if some words are misspelled."
Solution: This means all individual words on your phrase are valid, but they are either on the wrong order, or a typo changed one word into another valid word. This makes the phrase as a whole invalid. Check the full list of supported words here and look for words on your list that you could have misspelled, for example from "grid" -> "grit", "awake" -> "aware", "bind" -> "bird" (all of those words are, individually, valid)