1. Telephone is a way of direct communication, which can help you understand the needs of customers more quickly and accurately and provide professional advice.

2. Real-time authentication and information confirmation can be carried out by telephone to ensure transaction security.

3. Telephone can also help solve the problems or doubts that customers encounter in the process of filling in the application form, and provide relevant materials and documents in time.

4. Telephone is also an effective communication tool, which can provide timely feedback and follow-up with customers in the whole process, thus improving service quality and efficiency.