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We're excited to announce that our testnet has already been launched! Now everybody can take a look at our blockchain and get an impression of what it will look like after the official launch. You can also train yourself in MTR mining before the mainnet start.
It would be ideal if you take after this connection for point by point guidelines on the wallet begin on testnet:
https://github.com/metrosoftware/metrodex/blob/v0.0.1.testnet/testnet.md