8848 SMS can't be sent out. What happened? Why is it easy to use one card for 8848 mobile phone, but not two cards?

1, the mobile phone of Android system needs to set the SMS center number in engineering mode, and specifically enter: *#*#4636#*#* in the telephone dialing interface.

2. Then the engineering interface appears.

3. Select the mobile phone information and find SMCC below.

4. You need to convert the SMS center number to PDU format before entering it, and then press "Update". Go to this website: www.twit88.com/home/utility/sms-pdu-encode-decode, and find this interface at the bottom of the page:

5. Enter your SMS center number in the SMSC box, and then click the conversion below to generate the PDU format in the right box, and then take the first 18 digits. For example, the PDU format of my SMS center number is 0891683108501505f0, and then put this 18.

6. If all the numbers are correct, the SMS will definitely be sent normally. Not only this model, but also other models.