Bitcoin Forum

What will happen if I import a bitcoin address to two different wallets. does the first one that receives wins? just wondering because I just made a vanity address and I put on 2 different computers..

Nothing much, until the world ends.

It's really really inadvisable to run multiple wallets with the same keys in them. If you manage to make a transaction on one before it learns of a transaction made by the other one you can end up double spending yourself.  This isn't directly a problem, but in doing so you can end up with stuck coins which are then impossible to spend without going and blowing away the history of your wallet.

In general key importation seems to be dangerous for most users, since if they're at all confused about how Bitcoin works under the hood (e.g. if they think the Bitcoin network has 'balances' it maintains) they can easily end up losing coin forever.

So, how do i delete an address (private key and public key) from QT?  I figured it wasn't a good Idea, dont ask me why I even did it...

would i be okay if I never used those addresses?

I have a wallet on my phone, and wallet on my computer. I'd like to have my bitcoins available from both locations. What is the practical way to do this?

The only reasonably reliable practical way to do this right now is with a web hosted wallet.  You may want to consider https://blockchain.info/wallet

What about Electrum?
Works fine on multiple machines and you don't have to trust a wallet-hoster.

I hadn't realized there was an Electrum for mobile phones.

There have been a bunch of people showing up in IRC in the last couple months with BC.i wallets with stuck double spent transactions from concurrent use. Be careful.