This is different from bank to bank. If I use CCB's credit card to call their 400 customer service phone to check the limit, I will broadcast it directly on the phone through the voice system or through manual customer service, and no short message will be sent to my mobile phone. Unless I go to CCB to check the quota by SMS, there will be a SMS reply. But I tried, if you call 400 to find someone to check this month's bill, the human customer service will automatically send a text message to my mobile phone to tell me the amount of this month's bill.