I think the security PIN feature is buggy. After the PIN has been entered once, subsequently opening Mycelium after turning off the phone/device (sleep mode) does not require entering the PIN anymore; it defeats the purpose of it being a wallet security feature. I feel that Mycelium should have a proper "Exit" option in the menu or somewhere so that the security PIN feature could manually be engaged/turned on "at will" and be required when Mycelium is subsequently reopened.
For not you just havery to remember to back out of the app completely. We'll probably save any serious security enhancement for the new app though.
I have hit 'back' until it went back to the Android home screen before and not had to enter the PIN to get back into the wallet.
I don't know if that's a bug or not, but as it stands, 'backing out' isn't enough to relock the wallet. I've had to hit the menu button and kill the app before it would re-ask for the PIN.
I want to import a seed from a dead phone onto my tablet which already has a mycelium wallet on there but can't seem to find a way to have two existing accounts running.
As others said, the current wallet only supports one seed. Any extra accounts will also be generated from that seed. If you want to import a new seed, you basically have to wipe the currently installed wallet. Just make sure you have a backup first. But an even better idea is, since our wallet seed is a BIP standard, you can import it I to any other wallet that supports standards (Electric and Armory do not). So, install Breadwallet on your phone, or MultibitHD on your comouter, and import the seed into those. Then send your money elsewhere.
This also isn't true. I have multiple unrelated HD wallets in my copy of Mycelium.
You can import multiple unrelated xprv... keys by going to the 'accounts' tab, hitting 'add account', then 'advanced', entering your PIN, then 'scan'. Scan a QR code that encodes the appropriate xprv... key and Bob's your Uncle.
For example, my first seed is "wild warfare ready", and account 0 for that seed gives these as the first 3 receiving addresses:
m/44'/0'/0'/0/0 148ALQxbYRwUyA4Ew7GKMSmjH8nEjxxTKt L1KtHnRkEMzjv4WKwuGfYoBpmMYprmk5fk2erQSgezCXnXNMmspy
m/44'/0'/0'/0/1 1H9FJCsYB844n5UmLMGRPgHUeUfDjiyDKi L5QKrFu9C1oy92WtuKS9GsMaCQAuhE93TYUrnEeQnk4DC2TH9en9
m/44'/0'/0'/0/2 13ykWt1fG5RgYTCujWtaYmtm6aE4H5BA26 KyfckQcCywHXdz1uqf9VTo8Y2VKqbetpnDmjxqQVUJqXzRekEDYR
The extended key for that account (BIP32 Derivation Path m/44'/0'/0') is xprv9zDDuXgC9CGbUftVmEuXGhU7AU6fa9yznKhDiBo8JJ76DBJfB9sPn4jdJnWpwoxK1MDKeyFYqof
X1JRUNWfrw4gbkAqh1pcq8uiWiiQNqaK, with a QR code like this:
My second seed is "exclude nice jelly", and account 0 for that seed gives these as the first 3 receiving addresses:
m/44'/0'/0'/0/0 1ExEF8oL65KKuxhxdGf51NEGvriZ4EG4Ze KzLK5Qyj4TBKE2YSHBSGGohqeU1x9f2TDGEba7j8sgFxjbr24hpv
m/44'/0'/0'/0/1 1A9pbo4ZTK6NphUBGD9fjqQ59PoSqsgF1E KxayeM37UB5yorx2zYHeaQ1sKVqqMgxyhRkcUHYK771xAg89WR3Y
m/44'/0'/0'/0/2 186E52E9yuiMLv3mcufbkqkRhNCWk9M5tF L2ed5W1emYGx12Jic9Aj5oSuZ3Fo7awDQsWFNGQ5U9Gd2R9auuPK
The extended key for that account (BIP32 Derivation Path m/44'/0'/0') is xprv9z5bbZdcfzWtBh5LDk9Qv4zcAnrvzbcpwzrmm1J4dmFF5ygcj7oBinXizMoJKaBSfMixAwH6cEp
XbZU4gBrroMi322oN1sFFTmSiTxhNBcS, with a QR code like this:
After importing those two QR codes I see two accounts, each showing the appropriate receiving address:
That's two different HD wallets, with two different seeds, in a single instance of the Mycelium app.