PayPal for Android won't switch to Production environment

So I'have integrated paypal-android-sdk:2.15.3 in my app and it works as expected in Sandbox. Now I want to move to production.

I switched the environment to PayPalConfiguration.ENVIRONMENT_PRODUCTION And the client id to the production client id. What happens is that first I can't login using my real PayPal account, second I see the blue Sandbox button as below screenshot:

my code:

PayPalConfiguration config = new PayPalConfiguration()
                .environment(CustomBuildConfig.PAY_PAL_CONFIG_ENVIRONMENT)
                .clientId(CustomBuildConfig.PAY_PAL_CONFIG_CLIENT_ID);

        PayPalPayment thingToBuy = new PayPalPayment(new BigDecimal(value), currency, item,
                PayPalPayment.PAYMENT_INTENT_SALE);
        Intent intent = new Intent(getContext(), PaymentActivity.class);
        intent.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, config);
        intent.putExtra(PaymentActivity.EXTRA_PAYMENT, thingToBuy);
        startActivityForResult(intent, REQUEST_CODE_PAYPAL_PAYMENT);

Where:

PAY_PAL_CONFIG_ENVIRONMENT = PayPalConfiguration.ENVIRONMENT_PRODUCTION; PAY_PAL_CONFIG_CLIENT_ID = "production client id";

Edit: Same production client id is already in use and working for the iOS client.