Unicom can't send short messages, but mobile can.

The reasons why mobile phones can't send short messages are as follows:

1. Is the status of the mobile phone number open normally? If the number is half stopped, you can't send short messages.

2. If the SMS center number is not set or set incorrectly, just reset it; (The SMS center number of Guangdong Unicom number is as follows:

1. The number of SMS service centers in Guangzhou, Zhuhai, Shaoguan, Huizhou, Zhongshan, Jiangmen, Zhanjiang, Maoming, Zhaoqing, Qingyuan, Yunfu, Foshan and Yangjiang is+8613010200500;

2. The telephone numbers of SMS service centers in Shenzhen, Huizhou, Shantou, Chaozhou, Heyuan, Meizhou, Shanwei, Jieyang and Dongguan are +86 130 1088500. )

3. The signal is weak, there is no signal or the battery of the mobile phone is insufficient, resulting in the information not being sent normally;

4. Because the system is busy, especially during the peak period of sending short messages on holidays, it is suggested that you try again later or avoid the peak period of sending short messages;

5. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number;

6. Whether the sending box is full;

7. I suggest you restart your mobile phone or change it for a test.

In addition to the above simple troubleshooting, it still cannot be solved. I suggest you take your card and mobile phone to the business hall for testing.