Why can't Unicom receive the early warning center to move?

Unicom can't get the early warning center to move because:

1. Regional coverage: Different operators have different coverage in different regions. In some areas, the network signal of China Unicom is not strong enough, which leads to the short message can not be conveyed in time or the signal is unstable.

2. Technical compatibility: the information of the early warning center is transmitted by using specific protocols or technologies. Unicom's network is incompatible with the transmission protocol of the early warning center, which will lead to the failure to receive short messages successfully.

3. User Settings: Sometimes users will set the function of intercepting specific numbers/short messages, or mistake early warning short messages for spam messages and automatically filter them. The early warning center is the institution or organization responsible for issuing emergency warnings and notices. Its main purpose is to send information about emergencies, natural disasters, security threats or other important events to the public, so that people can take necessary actions to protect themselves and others.