It is to compose and send text message from your Huawei E589 4G router. Take a look at the following steps.
Compose and Send Text Message
1Access Web Management Page
To compose message you’ll need to access the mobile broadband web management page. To do that, you’ll need to connect your computer to the device and enter the URL 192.168.1.1 into your web browser.
From the Web Management home page, click SMS.
At the following SMS page, click New Message. And then type in the message content.
3Send Text Message
In the Recipient’s field, enter the recipient’s contact number, enter the message in the Content field, then click Send.
Wait while the message is being sent. Click OK, the message has now been sent.