T3 owner forgot to answer the one-handed phone number.

1. Contact the owner through other contact methods: If the owner uses other contact methods when taking orders, such as WeChat and SMS, etc. You can try to contact the owner through these methods and tell them that you need to get the phone number back.

2. Use the information in the platform: Many taxi platforms allow passengers to leave messages for car owners on the platform. You can try to leave a message to the owner in the platform to explain your needs and provide the corresponding contact information. After seeing the news, the host may reply to your message.

3. Seek help from the platform customer service: If you can't find the owner by other means, you can try to contact the taxi platform customer service. Provide customer service with your order information and explain why you need to retrieve the phone number to answer the phone. Customer service may help you contact the owner.