(skip to Part 2 if you already know your 12 words)
Open Mycelium app.
Click the 3-dot-icon at the TOP right.
Enter your PIN (if you set one and it asks).
Wait 60 seconds for a countdown.
Keep tapping to show your 12 words. Write them down somewhere safe.
It asks you to type them back in, to confirm. You can skip by pressing the back key on your phone.
Part 2 – Setup Bitcoin.com wallet:
Open the Bitcoin.com app. (skip to step 11 if you used the Bitcoin app before, and already finished welcome mode)
If you never used it before, it will ask you to: create a new one, or Restore from backup. Don't click Restore (it didn't work for me). Just create a new BCH wallet. (You won't need it for now, but you need the welcome mode to turn off).
Next screens: Read about the Bitcoin.com app features, or click skip. It creates a wallet.
A green screen loads saying “wallet created.” Scroll down (tablet users). It asks for your email to send payment notifications (when you receive BCH). Enter your email. (I would not use gmail, hotmail, or any government/spy email. Use an encrypted email for BCH transfers so that your record is private and not audit-able. E.g. www.tutanota.com .)
Enable or disable get news. Then click continue, then confirm email.
Backup this new wallet. (You don't need this wallet to sweep your BCH. But backup this new wallet just in case you forgot that you were not going to use it.)
Click Got it, and I understand, to proceed.
Next screen, write down your 12 words exactly. Then click “I've written it down.”
Next screen. At the bottom: click your 1st word, then 2nd, etc, until you have the 12 words in order. Then click confirm, then got it.
Next screen. Click I understand, and agree to terms. Continue.
After you setup a wallet, go to the main screen. Click the PLUS icon where it says “Bitcoin CASH wallets.”
Choose New personal wallet.
Very important: Type in a wallet name. For this example I use “BCH Aug.”
Select coin: BCH
Click show advanced.
Click where it says “wallet key … Random.”
A popup menu displays. Click “Specify Recovery Phrase.”
Click where it says “Enter the recovery phrase.
Paste in or type your 12 words from your Mycelium backup, not the new bitcoin.com wallet you just made.
Keep Derivation path at: m/44'/0'/0'
At the bottom click “Create new wallet.”
The wallet should be created.
Critical steps. Go to the home screen. Click settings icon at the bottom right.
Next screen. Scroll down to the list of Bitcoin Cash wallets. Find “BCH Aug” or whatever you named the wallet you just made.
Next screen. Scroll down and click more options.
Click wallet addresses.
Click “scan addresses for funds.” If it works, a new green-screen should pop up and show some BCH coins, which is the number of BTC coins you expected to have. (The same 12 seed wallet had both BTC and BCH coins. But now you imported the seed, and calibrated the wallet to be on the BCH chain.) If the scan worked, click the back button, then set a PIN for the Bitcoin app. (Go to Settings > Lock App > set PIN. Write it down somewhere, and email it to yourself using your encrypted email – so no one can hack or subpoena your inbox.) You can use your wallet safely now. You can skip the remaining steps.
If the scan showed zero, then do these next steps. Look where it says “Unused Addresses.” Tap the Plus icon 6 times. Then click scan again. If this doesn't show your coins, then tap the Plus icon 6 more times again, then scan. (Mine worked by just tapping it 6 times. But if not, tap up to 20 times, until you get an "Empty addresses limit reached" message; then click scan.)
Your coins should show in the balance after this. If not, then post below for someone else to answer what to do, since it exceeds the scope of this tutorial. Thank you.
I spent 3 hours searching, experimenting, then writing this. I didn't find an exact answer for BCH and Mycelium > Bitcoin.com app. So I tried things until it worked for me. If it was helpful then let me know :) Thanks to bitcoin.com for making a BCH wallet with a PIN lock. I request that they add the APK file somewhere to download, in case you don't have GooglePlay, or you want a backup of the Install file.
The new biggest feature is complete support for Tor, though the Orbot app, that connects directly to our nodes running as a hidden service (with a .onion extension). The wallet will now monitor your Orbot connection, launch it if it's not running, and will let you know if Tor access is available or not. Previously if Tor access wasn't available, Android OS would quietly switch it over to open web without us being able to control or stop it. We initially included built-in Orchid library, that would have allowed the wallet to have its own built-in Tor without any third party apps, but it proved to be extremely slow (took a minute or longer to connect and synchronize every time). If anyone has trouble getting Orbot due to it being blocked in your country, let us know and we may host an apk of it ourselves as well. Other changes include:
Multiple fiat selection - you can now select a few currencies at the same time, and cycle through them in your balance, send, and receive displays (just press on the currency code with a tiny triangle in the bottom-right corner)
Creating single key accounts was restored due to popular (aka bos's) demand
Transaction confirmations are now shown as pie charts (yellow to green) as opposed to number of confirmations (doesn't confuse newbies)
In Transactions tab, you can now add outgoing transaction addresses to the address book
Transactions tab now shows fiat values. However, initially these are just values shown at the current price, not historical prices. We will implement historical prices in the future (that would require our server to keep a running record on multiple exchanges and for multiple currencies)
In Transactions tab, added a "Reload Account" button if the list is empty, and "Reload Account" in the menu that you can run any time in case you think transactions are missing
In Accounts tab, split the list of accounts into subcategories, with "HD," "Other," and "Archived."
In Accounts tab, there are now subtotals for each account type, and a total for all active accounts.
The totals can be shown in Fiat or Bitcoin by pressing on the Total number.
Added the option to select miner-fee directly in send-dialog
Connection-logs are now available in the about-dialog
Added bitfinex as price-source
Added option to export xPub/xPriv key of HD-Accounts
NFC icon is shown in the Receive dialog if NFC is available
If wrong PIN is entered, it now shows a PIN reset hint
App now shows a list of changes after each upgrade
[bug] Fix wrong locale for some LT-messages
[bug] Google-Geocoder JSON response changed
[bug] Fix number entry in send-dialog, [GitHub:146]
Now we are on to adding more support for HD accounts such as Cold Storage spending from HD paper wallets and HD watch only addresses, built-in support for Trezor and Ledger, and a slew of other things. Please let us know if you run into any problems, and give us feedback for things you would like us to add to our immense To-Do list. You can download it from Google Play or directly from our site here https://mycelium.com/bitcoinwallet
When you click the + button in the Accounts tab you can create a new HD account. The first time you do this a master seed will be created. All HD accounts are derived from the same master seed using BIP44 account derivation. You can create your master seed from a BIP39 word lists (like with Trezor), or from an internally generated random number, or from an encrypted PDF backup (restore scenario).
If you only use HD accounts you will only have to make one backup ever.
An HD account automatically generates a new receiving addresses when you receive a payment to the current receiving address.
An HD account automatically generates new a new change addresses when you send a payment that requires change.
Transactions that you create while offline or with bad network connection get broadcasted once you go online.
Transaction history is not limited to the last 20, and allows for seamless expansion when scrolling.
You can put labels on transactions.
You can have your classic single address accounts side by side with HD accounts.
You can list the unspent outputs for all your addresses in an account. Nerdy feature, but nice to have now that your balance is spread over several addresses.
You can have as many accounts as you like (HD or not), but your wallet will be slower if you have many. Since HD accounts produce unlimited amounts of new addresses as you use them you will eventually feel the effect. To mitigate that you can archive accounts as they grow heavy. You can activate archived accounts as you wish. TL;DR Help us testing the testnet version of Mycelium 2.0 to get the production version out faster If you need testnet coins strike a deal with Virtual Trader by clicking "Buy / Sell Bitcoin"
Is there a way to isolate a private key in a (smartphone) and use the product of that key to broadcast a transaction?
Let me explain. I need a private key (maybe a paper private wallet/key that I show to Mycelium) to let the app know that I am the true owner of the "account". So my smartphone (freshly factory resetted and Mycelium has been installed from an .apk file downloaded from the website previously, installed from the SD card socket) goes online to broadcast the transaction and there is a small chance that there is a person or machine trying to hack into my smartphone, plant snooping software and work out my private key. Yes, it's unlikely to happen, but it could happen. My bitcoin stash isn't 100% safe. So let's imagine an intermediary smartphone. Factory resetted, and the apk file installed from the SD card socket. I could take a soldering iron to the wifi chip and overheat it, so it's unusable online. Basically, this smartphone has never and will never go online. Ever. This smartphone scans my paper private key. It then processes it and produces a 'safe' key, maybe it's the public key, maybe it's an intermediary. It's displayed on the screen of my safe smartphone. My second smartphone then scans the screen of that, and broadcasts that key. I hope that I've got the terminology alright. Here are my questions: Does this exist? What's it called (the method)? Which apps provide functionality? Thanks.
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