How to connect WP76xx to the Internet by AT command without Legato


#1

We are trying Internet connection by AT command for simple test of WP76xx.
But that does not work.

Currently, Windows PC is connected with MangOH Green with a USB cable. MangOH Green accepted AT command after power on. And the APN has been set. After this, ATD*99***1# was sent to the modem port, and PPP was started. However, NO CONARRIER was returned immediately after CONNECT. CEER result: + CEER: EMM attach failed

Note:
The SIM used in the test can be connected with MC7430.

Could you tell me the settings and procedures to connect the WP76xx to the Internet without Legato?