Hi eric.koester,
The “A710” is password on my module.
!ENTERCND command
Enable access to password-protected commands
Before you can use any password-protected AT commands, you must enter the password correctly using this command. The initial password is configured onto the modem during manufacture. You can change the password using !SETCND. If you do not know the password, contact your Sierra Wireless account manager.
Once the password has been entered correctly, the password-protected AT commands are available until the modem is reset or powered off and on.
Please refer to AirPrime EM73xx/MC73xx AT Command Reference.pdf for more details.
https://source.sierrawireless.com/resources/airprime/software/airprime-em73xx_mc73xx-at-command-reference/#sthash.jeQzolbu.dpbs
Please try configuring MC7355 with APN “n.ispsn”. You need to provide Sprint the MEID (mobile equipment identifier) to activate it.
This forum is a community of Sierra Wireless module users. The best way to get support is through your commercial channel (i.e who you bought the unit from) in this case.