I am very sorry that I cannot use it in China. If you still cannot solve your problem, I suggest that you describe the problem in detail and upload the related log, and then send an email to firstname.lastname@example.org.We will have relevant R&D to handle the exception and help for you.
ok thanks i will write an email.
Hello bilal_farooq, I’m not using the .pem file, but when I tested your program with this change:
AT+QMTCFG=“pdpcid”,1,2 --> AT+QMTCFG=“pdpcid”,1,1
it works for me.