nó báo thế này

- Repeat the procedure. Sometimes it is a matter of temporary communication problem or similar.
- Check that all used cable are solid without any visible damage and have good contact. If possible, try with other cables.
- On rare occasions phone might be damaged or dead. So, if possible, try with another phone.

như vậy là do cable lỗi hay box hay là e cài sai hoặc thiếu gì . mong ae giúp đỡ