I reinstalled the wallet app and i have recovery phrase, but where do i use the phrase?
Assuming there's no passphrase on the wallet, and it's deleted (after reinstalling), then:
Open the Wallet app, choose which wallet you want to restore, either BCH (top) or BTC Core (below it).
Tap the + button.
Tap import wallet.
Type in your 12 word recovery phrase. Make sure the spelling is correct, that there is no more than 1 space between each word, and no trailing space(s) at the end. Ensure you have the correct coin there (BTC/BCH). If you tapped the correct + button, you'll notice you don't have to change that.
Now tap import.
And you should be good to go. If it can't contact the server or there's another problem is scary red text at the top of the screen, just try again in a couple of minutes. Sometimes it can't contact the server, so just copy the recovery phrase ready to use next time, and you can paste it in and tap the import button again.
This assumes the Bitcoin.com wallet. Hope this helps,
Good luck!