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-install metamask extension on your browser. -resister to https://infura.io/dashboard/ethereum and you can select the testnet(ropsten, kovan, rinkeby...) and check the project_id -faucet free eth to your wallet to test transaction(aucet.rinkeby.io for rinkeby, https://faucet.ropsten.be/ for ropsten, https://enjin.io/software/kovan-faucet for kovan) from web3 ...


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Your Geth version is outdated-you are likely on a "wrong", forked chain. There was a consensus issue between nodes on Ropsten which was fixed in v1.10.6. Even then, you may be on a "double" forked chain because of an exploit on nodes >v1.10.7. Update your node and you should be good.


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