Tell me, but rather share a link to the guide how to get a coin Tether(USDT) in your wallet.
According to
this page, you can access your Tether account through
Trezor Beta Wallet. It is listed as an ERC20 token so you will have to switch to Ethereum wallet. You can also use
MyEtherWallet.
Also interested in the question about the coins in different blockchains, if I send from the throne to Ethereum or Bitcoin coins come? Wallet address in all networks one?
Most blockchains have different addresses. They are not cross-compatible. Your Ethereum address will be significantly different than your Bitcoin one. Some Bitcoin forks introduced their own address formats but they still support Bitcoin ones (e.g. Bitcoin Cash). Coins sent on Ethereum network to a Bitcoin address will be lost (burned).