SO much wisdom here thank you friend.
So can I get my BTC back by logging into mainnet? Where do i do that
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Can you tell us if how did you get and received your BTC to your wallet?
So that we know if you have mainnet BTC or the testnet coin?
Did you send the BTC under that testnet address?
Adding more info about where did you get your BTC will help us to know if your BTC is on the mainnet or not.
If it just a testnet coin o_e_l_e_o is correct so there's no way to send it to mainnet wallet.