1. Busy customer service line: If the customer service line of Fubon Huayi Bank is busy, the call may not be answered. This may be due to a large number of customers calling customer service at the same time, resulting in line congestion.
2. Insufficient customer service staff: If Fubon Huayi Bank does not have enough customer service staff to handle all customers' inquiries and questions, it may also lead to the phone not being connected.
3. Equipment failure: Fubon Huayi Bank customer service equipment failure, the phone may not be connected.