Why can't I check the balance of the package? Mobile phones always send text messages saying that the selected service does not support numbers.

If the remaining traffic cannot be queried, the following situations are not excluded:

1. If the remaining flow of the traffic packet is queried, if the processed traffic packet has not yet taken effect, and if it takes effect next month, it will take next month to query;

2. The query path is wrong, which makes it impossible to query;

3. The number cannot be queried under abnormal opening conditions such as overdue downtime.

In spite of the above, you still can't inquire. I suggest you consult the Unicom manual customer service to which the number belongs.