For those of you who are having problems adding cards or SPIC randomly displaying different results for play integrity, a little help:
I have a Mi 11 Ultra, using the latest xiaomi.eu release, even following all the steps in the tutorial it was not possible to add cards to the wallet and it showed errors with integrity. After downloading the latest build and doing a fresh install, I followed the tutorial again and now everything is working.
P.S: For Brazilians, you can use the Mercado Pago app, which allows you to add cards and make NFC payments, just like Google Wallet.
I have a Mi 11 Ultra, using the latest xiaomi.eu release, even following all the steps in the tutorial it was not possible to add cards to the wallet and it showed errors with integrity. After downloading the latest build and doing a fresh install, I followed the tutorial again and now everything is working.
P.S: For Brazilians, you can use the Mercado Pago app, which allows you to add cards and make NFC payments, just like Google Wallet.