# Go Live on iPhone

Once you have passed certification you can prepare your iPhone App for the live environment.

## Go Live Steps

- Obtain the `config_prod.env` file from Tyro. Add this to the root level of your App.
- Make sure you are initialising `TyroTapToPay` with the `.prod` environment.
- On your server, use your Tyro production credentials and Merchant ID (provided during webhook authorisation call).


You're now ready to start taking real payments!