You can't send a text message by directly entering the number in the dial-up panel. Why?

First, you need to determine the SMS service center number of your calling card. For example, the number of the short message service center is+8613010811500. To determine the number of SMS service center, you can also call customer service or inquire online.

After confirming your SMS service center number, enter * # * # 4636 # * * in the dialing interface to enter the test.

After entering the test interface, click on the mobile phone information. After entering the mobile phone information interface, an SMSC item will be found on the drop-down page, and the box is empty.

Then click Update, and the box will display: Update Error.

At this point, we need to convert our SMS center number into PDU format and input it into the box. There are two ways to convert the number of SMS center into PDU format. The easiest way is to go to the website given in the tools/materials and find the SMSC input box. Enter our SMS center number in the SMSC box, such as++861301081500 in Bian Xiao, and then click the conversion below, and the PDU format will be generated in the box on the right, with 18 digits before copying, so the PDU of SMS center number in Bian Xiao.

Then enter the 18 character obtained above into the SMSC box in the mobile phone, and finally click "Update" at the back.

If the updated number is correct, you can send a text message directly, and friends can try it.

Another way to get the PDU format of SMS center number is to get it manually. Add an English letter "F" at the end of our SMS center number and remove the "+"sign at the beginning. From left to right, a group of two numbers exchange positions with each other and are arranged in order. When finished, add four digits of "089 1" at the beginning of the center number.

The following is the detailed operation:

First, the number of the SMS center is+8613010811500.

Then remove the+sign and add "f" at the end: 8613010811500f.

Then, combine the two numbers in reverse order: 683110801105f0.

Finally, add "0891"before the reorganized SMS number: 089168311105f0.