# GL7600 getting intermittent +CMS ERROR: 620

**URL:** <https://forum.sierrawireless.com/t/gl7600-getting-intermittent-cms-error-620/9554>\
**Category:** GL Series\
**Created:** [October 18, 2017, 6:06pm UTC](https://forum.sierrawireless.com/t/gl7600-getting-intermittent-cms-error-620/9554 "2017-10-18T18:06:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![clickndeploy](https://avatars.discourse-cdn.com/v4/letter/c/91b2a8/32.png) [@clickndeploy](https://forum.sierrawireless.com/u/clickndeploy)\
**Post date:** [October 18, 2017, 6:06pm UTC](https://forum.sierrawireless.com/t/gl7600-getting-intermittent-cms-error-620/9554/1 "2017-10-18T18:06:53Z")

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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! 😃

 ![](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/5/5d6c1f841e89431ae55d21166dea97413195e2fe.jpeg)

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**Author:** ![Moderator1](https://avatars.discourse-cdn.com/v4/letter/m/9fc348/32.png) [@Moderator1](https://forum.sierrawireless.com/u/Moderator1)\
**Post date:** [October 25, 2017, 8:43am UTC](https://forum.sierrawireless.com/t/gl7600-getting-intermittent-cms-error-620/9554/2 "2017-10-25T08:43:13Z")

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Hi,

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

Thanks & Regards,  
Moderator