BG95 M3 can't activate PDP context

i need to open a socket but i can’t get ip, i stuck at AT+QIACT? also when i try to do manually i’m not getting response please help me!

Dear Customer,

It’s APN issue. Are you using China Unicom sim? If not, you have to modify the correct APN name here:
If you don’t know what’s your APN name. Keep is blank.

Best Regards,