I am trying to setup Nokia 31 GSM as a wireless modem. However, when I powered on it, I only saw LED3 blink Green/Red. From the setup guide, LED1, LED2, LED3 all should be solid green. I tried a couple of AT commands, some of them seem work, but I can't send SMS message from it.
Do you any any idea? Do you think the hardware (modem) itself is OK?
Thank you for help