http://bip32jp.github.io/english/
For Derivation Path choose "Trezor k'th account i'th keypair (receive): m/44'/0'/k'/0/i"
and then also "Trezor k'th account i'th keypair (change): m/44'/0'/k'/1/i"
(the second one will contain your change addresses.)
1. You can download the entire site from https://github.com/bip32JP/bip32JP.github.io/archive/master.zip if you want.
(besure to open the index.html file inside the english folder.)
2. discover each address by selecting the Derivation Paths I mentioned above, and change the Keypair Index (i) one at a time, copy the "Address" at the bottom, and check the balance at blockchain.info etc.
3. Gather the Private Key (WIF) from the ones that had balances, and import them into any desktop wallet.
4. VERY IMPORTANT. NEVER USE THAT BACKUP PHRASE AGAIN! The theif might have knowledge of it now, so once you get a new phone, generate a new one.