1. The package you use does not support querying traffic information through Unicom client.
2. The status of the mobile phone is abnormal, which affects the query;
3. The query method is wrong. If you dial the wrong number, you can check whether the operation is wrong. Unicom generally calls 100 10 13 to inquire about traffic information. Because the policies of different cities are different, the specific instructions of local customer service inquiries shall prevail.
4. The system is busy. If the system is busy because a large number of users are currently accessing this operation, you can try again later.
If your query method is wrong, the system will not send SMS results generally. For more details, it is recommended to contact the customer service of the place of origin, subject to the policy of the place of origin.