How to Recover a Mycelium Wallet: Seed, PDF Backup or Old Phone

This guide shows how to recover a Mycelium wallet step by step, with or without the original phone.

The app is gone, the phone died, or the PIN simply won’t come back to you, and your bitcoin sits somewhere behind it. Whether you can get back in depends on one thing: what you still have. Before you reinstall anything or start guessing, take two minutes to understand how Mycelium actually stores your coins, because the wrong first move can cost you options.

Your bitcoin was never in the app

Mycelium is a mobile Bitcoin wallet and one of the oldest still in popular use. The app never held your coins. Your bitcoin lives on the blockchain, and it’s still there, untouched by anything that happened to your phone. What the app held were your private keys: the way in.

That’s why losing the phone, deleting the app, or forgetting the PIN doesn’t destroy anything by itself. What matters is your backup, and Mycelium has used two very different kinds:

• A 12-word seed phrase. Standard for every HD account, the normal account type Mycelium has created for years. The phrase follows BIP39, a shared standard, which is why it also works in other wallets.
• A PDF backup. Single Address Accounts hold one fixed Bitcoin address with its own standalone private key. Older Mycelium versions let you create them, and the current app still lets you add one by importing a private key. Their backup is Mycelium’s Encrypted PDF Backup: a printable PDF with the encrypted key as a QR code, unlocked by a 15-character password that the app showed only once. Its instructions told you to write that password into the blue boxes on the printout.

The distinction matters, and it decides everything below. A Single Address Account is not part of your 12 words. Restoring the phrase brings back your HD accounts and nothing else.

Before you try anything

If the app still opens on any device, back it up right now through the app’s backup menu and write the words on paper. Do that before you update, reinstall, or experiment. Check all account types too: Single Address accounts and separately imported private keys need their own backup. Verify that backup before deleting any app data; the 12 words restore only the HD accounts derived from them.

If it doesn’t open, write down everything you still know: where the phrase might be written, which words you remember, whether a PDF ever existed, roughly when you created the wallet. Old written notes, safes, filing cabinets, password managers, and backups of previous phones are the usual hiding places. People find backups in drawers they stopped checking years ago.

Two safety rules while you search. Download Mycelium only from the official app stores or wallet.mycelium.com. Fake wallet apps exist precisely to catch people mid-recovery. And never enter your seed phrase into any website, “checker” tool, or form. No legitimate service asks for it online.

You have your 12-word phrase: restore it step by step

With the phrase in hand, the rest is mechanical. The restore takes about five minutes:

• Install the Mycelium app on your (new) phone from the official store.
• Open it and choose “Restore Backup” instead of “Create New”.
• Choose the length of your word list and enter the 12 words in their original order. Mycelium also accepts 18- and 24-word phrases if yours came from another wallet. Leave the “I have a passphrase” box unchecked unless you know you set one: a normal Mycelium backup never includes a passphrase, and it is not your PIN.
• Set a new PIN when prompted.
• Let the app sync. Your accounts, addresses, and balance load from the blockchain.

If a word won’t autocomplete while typing, you’ve likely misread your note: every valid word comes from the fixed BIP39 list of 2,048 words, so “buiId” with a capital i simply doesn’t exist in it. Check the handwriting again before assuming the phrase is wrong.

One warning repeated on purpose: type those words into the Mycelium app only, never into a browser.

You have the old PDF backup

Then your coins sit in a Single Address Account, and the phrase route doesn’t apply. Open Mycelium, go to the cold storage function, scan the encrypted QR code from the PDF, and enter the 15-character password together with its checksum character, as written in the blue boxes. The app decrypts the private key and shows the balance, and from there you can spend or move the coins.

This route can fail in two ways: the printed QR code has faded or been damaged, or a few characters of the 15-character password are missing or illegible. Both are constraint problems rather than dead ends (the fewer characters are missing, the smaller the search), and both are the kind of case a professional recovery can often take on.

You forgot your PIN

Your bitcoin isn’t gone. The PIN only locks the app on that one phone; it protects nothing on the blockchain.

With your 12 words, you can restore the HD accounts on another trusted phone and set a new PIN while preserving the original app. Only reinstall on the original phone after verifying the backups for every account, including any Single Address accounts or separately imported keys. Mycelium also has a built-in PIN reset, but it deliberately makes you wait about seven days before the PIN is removed, a protection against a thief with your phone in hand. It is available only if the PIN was set as resettable, which is the default; otherwise the app says the only option is to recover from your backup.

If you do NOT have your words, stop. Do not uninstall the app, clear its data or reset the phone. That working app is currently the only copy of your keys. Use the reset waiting period if you must, and get a backup made the moment you’re back in.

You restored, but the balance shows zero

Usually the coins aren’t lost. Work through these causes:

The coins were in a Single Address Account. The seed phrase only regenerates HD accounts. If your bitcoin sat on a single-address key, it won’t appear after a phrase restore: you need the PDF backup or the original device for that key. Check your old records for a PDF before concluding anything.

The phrase is valid but wrong. BIP39 phrases carry a checksum: the final word is partly determined by the others, so most typos get rejected outright. But if you saved more than one phrase over the years, such as a test wallet or an abandoned setup, you can restore a perfectly valid phrase that was never the funded one. An empty wallet after a clean restore can mean a different phrase exists somewhere.

A passphrase was added by mistake. Mycelium’s own help on missing coins warns about restoring with the PIN typed in as a passphrase: a wrong passphrase doesn’t cause an error, it opens a different, empty wallet. Restore again with only the words.

The coins are in a second account. If the old wallet had more than “Account 1”, the restore doesn’t recreate the extra accounts by itself. Mycelium’s help says to go to the “Accounts” tab and create a new account to rediscover them.

The addresses lie beyond the gap limit. Mycelium checks only 20 addresses ahead. If coins arrived through outside tools, its “Boost Gap Limit” option checks 200 addresses on all active accounts once.

The app hasn’t synced. Without a server connection, Mycelium may even show 0 BTC. Give it time on a stable connection. If you know one of your old receiving addresses, look it up on mempool.space: it shows you, independently of any app, whether the coins are still sitting there. Our page on a zero balance after a restore covers the same problem for other wallets.

Your phrase is incomplete or gets rejected

This is where home methods end and systematic work begins. The math is what makes partial recovery realistic: each missing word has exactly 2,048 candidates from the BIP39 list. One missing word means 2,048 possibilities, which a computer clears in seconds. Four missing words mean roughly 17.6 trillion raw combinations, but the checksum invalidates most of them before any real testing starts, and knowing the positions of the missing words shrinks the space further.

We take on Mycelium cases with an invalid phrase (a wrong word, wrong order, a checksum error) or an incomplete phrase missing up to four words, which is the range we work with, running the search systematically on GPU hardware — on machines that are never connected to the internet, and never before a contract is signed. Simple cases resolve in days; hard ones can take weeks. What we can’t do is promise an outcome: feasibility depends entirely on how much of the phrase survives and what else you remember.

Our guide to recovering a missing word in a seed phrase explains the method in more detail. For the same situation on other wallet types, the broader guide on recovering a Bitcoin wallet covers it.

When recovery is not possible

Honesty is cheaper than false hope, so here it is plainly. A completely lost 12-word phrase — no written copy, no PDF, no device with the app still installed — cannot be recovered by anyone. The phrase encodes a 128-bit number: without constraints, that's 2^128 possibilities, far beyond what all the computers on earth combined could search through in any useful time. A service claiming otherwise is describing something that cannot be done.

A dead phone is a maybe, not a yes. If the app’s data still exists in the phone’s storage, extraction is sometimes possible on older devices, but modern Android encrypts everything, and without the phone unlocking, that door generally stays shut. We’d rather tell you this before you spend money on it than after.

And since desperation attracts predators: blockchain transactions are irreversible, and we don’t take stolen-crypto or scam cases. Our work is reconstructing access for people who still own their coins.

PIN, password, or seed phrase: which one do you need?

People arrive searching for their “Mycelium password,” but Mycelium has no account password. Three separate secrets exist, and only one of them rebuilds the wallet. The PIN opens the app on one specific phone and can be replaced. The 15-character password opens the PDF backup of a Single Address Account. The 12-word phrase rebuilds all your HD accounts on any device. This is the one that matters most, and the only one that must never touch the internet. The optional passphrase on the restore screen is not a fourth secret you are missing: a normal Mycelium backup doesn’t have one.

Keep this from happening again

Once you’re back in, move the recovered coins to a fresh wallet with a newly generated phrase: sweeping to a clean start beats trusting a backup that already failed you once. Then write the new phrase on paper twice and store the copies in two separate offline places. Not in a screenshot, not in cloud notes, not in an email draft: anything that syncs online can be read by whoever gets into that account. Paper fades and burns; for larger amounts, a metal backup plate survives what paper doesn’t.

If your situation involves an incomplete phrase, a damaged PDF backup, or words you’re no longer sure about, start with a free assessment: an honest answer on whether it’s worth pursuing, before any commitment. You can also contact us and describe what you have, without sending the words themselves. No recovery, no fee, and your coins never pass through our hands. If the search succeeds, the agreed fee is a separate payment you make under the contract; nothing is taken from the wallet.

FAQ: Mycelium wallet recovery

Why does my restored Mycelium wallet show a zero Bitcoin balance?

A zero balance usually means you restored a different recovery phrase or your Bitcoin was stored in a Single Address Account that requires its PDF backup instead of the seed phrase. Check one of your old wallet addresses on a Bitcoin blockchain explorer to confirm your funds are still there.

Can I restore my Mycelium recovery phrase in another wallet?

Yes. Mycelium uses the BIP39 recovery phrase standard, so it can be restored in many compatible wallets. If your balance does not appear after restoring, make sure the correct derivation path is selected.

Can I recover a Mycelium wallet without the recovery phrase?

Recovery may still be possible if you have a PDF backup for a Single Address Account, access to a device with the wallet installed, or only a few missing words from the recovery phrase. Without any backup information, recovering the wallet is generally not possible.

Can I recover my Mycelium wallet password?

Mycelium has no account password to recover. The secrets that can be lost are the app PIN, which only locks the app on one phone and, if it was set as resettable, can be reset after a wait of about seven days; the 15-character password of an Encrypted PDF Backup; and the 12-word phrase, which restores HD accounts without any password. If a few characters of the PDF password are missing or illegible, a search over the missing characters is sometimes possible.