Add Trust Wallet security info (#10516)

automerge

docs/src/wallet-guide/apps.md

@@ -7,6 +7,25 @@ experience for most people who are new or experienced with using crypto wallets.
 currently the easiest and fastest way to get set up with a new wallet on Solana.
 The app is free and getting your wallet set up only takes a few minutes.
 
+### Trust Wallet Security
+
+Tokens held in Trust Wallet are only as secure as the device on which the app is
+installed.  Anyone who is able to unlock your phone or tablet may be able to
+use the Trust Wallet app and transfer your tokens.  To improve security,
+you can add a passcode to the Trust Wallet application.
+To add a Trust Wallet passcode, open the app and go to
+Settings -> Security -> Passcode.
+
+If someone gains access to your Trust Wallet application, they can access your
+recovery seed phrase.
+Anyone who has access to your seed phrase will be able to recreate
+your Trust Wallet keys on a different device. From there, they could
+sign transactions from that device rather than on your own phone or tablet.
+The seed phrase is displayed when a new wallet is created and it can also be
+viewed at any later time in the app by following these steps:
+ - Go to Setting -> Wallets
+ - Under the Options menu for a particular wallet tap "Show Recovery Phrase"
+
 {% page-ref page="trust-wallet.md" %}
 
 ## Ledger Live with Ledger Nano S

docs/src/wallet-guide/cli.md

@@ -59,7 +59,7 @@ some interface for signing transactions.
 A hardware wallet, such as the
 [Ledger hardware wallet](https://www.ledger.com/), offers a great blend of
 security and convenience for cryptocurrencies. It effectively automates the
-process of offline signing while retaining nearly all the convenience of an FS
+process of offline signing while retaining nearly all the convenience of a file
-wallet.
+system wallet.
 
 {% page-ref page="../hardware-wallet/README.md" %}