user63717: I changed BCH in my Trezor to BTC using the wallet coin splitting tool and sent it back again to the same wallet using a new BTC receive address rather than another external wallet like eg Electrum using Shapeshift exchange. But the BTC didn't arrive. Have I lost the coins or are they just lurking in cyberspace waiting to be found again ? 

user52686: If you sent BCH to your Trezor BTC address or vice versa, you can use https://trezor.io/recover-coins/ to recover your coins.  The only exception is if you send BCH to a BTC 3... address (segwit), since these are not supported by Bitcoin Cash.
To convert BCH into BTC or vice versa you need to use an exchange.

63717: <p>I changed BCH in my Trezor to BTC using the wallet coin splitting tool and sent it back again to the same wallet using a new BTC receive address rather than another external wallet like eg Electrum using Shapeshift exchange. But the BTC didn't arrive. Have I lost the coins or are they just lurking in cyberspace waiting to be found again ? </p>
 52686: <p>If you sent BCH to your Trezor BTC address or vice versa, you can use <a href="https://trezor.io/recover-coins/" rel="nofollow noreferrer">https://trezor.io/recover-coins/</a> to recover your coins.  The only exception is if you send BCH to a BTC 3... address (segwit), since these are not supported by Bitcoin Cash.</p>

<p>To convert BCH into BTC or vice versa you need to use an exchange.</p>
