GL7600 getting intermittent +CMS ERROR: 620

I’m getting this strange +CMS ERROR: 620 error which occurs intermittently when trying to send SMS using my GL7600. Error 620 is not in the AT command guide -AirPrime_HL76xx_AT_Commands_Interface_Guide_Rev6_2.pdf

I can’t seem to fix a reason for this intermittent error. Any advice will be much appreciated! :smiley:


This problem needs a detailed technical analysis. Please contact your Technical support in SWI to provide you the solution.

Thanks & Regards,