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Sorry, can you clarify s3? what is it-- phone or Antiminer (BTC ASIC miner)?

Antminer S9: https://shop.bitmain.com/antminer_s9_asic_bitcoin_miner.htm?flag=specifications is the most current product. You can order directly on their site. S3 is not profitable unless you have free power. I sold my two S3 one year back only for $50.

Is there no way to convert them to mine other asic coins or forked btc?

People have told me it is possible to mine all asic coins with them is this true?

Yes, any coin with sha256 algorithm such as BTC or BCH are mineable. However, you have to calculate after power usage it is profitable or not. https://www.coinwarz.com/calculators/bitcoincash-mining-calculator/?h=460.00&p=400.00&pc=0.10&pf=0.00&d=284346356418.23000000&r=12.50000000&er=0.17454000&btcer=16114.49000000&hc=0.00

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