# UART AT Command hang when make a phone call

**URL:** <https://forum.sierrawireless.com/t/uart-at-command-hang-when-make-a-phone-call/24353>\
**Category:** RC76\
**Created:** [July 23, 2021, 1:11pm UTC](https://forum.sierrawireless.com/t/uart-at-command-hang-when-make-a-phone-call/24353 "2021-07-23T13:11:42Z")\
**Posts on this page:** 1\
**Showing post:** 31

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**Author:** ![nguyenducminh](https://avatars.discourse-cdn.com/v4/letter/n/a6a055/32.png) [@nguyenducminh](https://forum.sierrawireless.com/u/nguyenducminh)\
**Post date:** [November 8, 2021, 7:55am UTC](https://forum.sierrawireless.com/t/uart-at-command-hang-when-make-a-phone-call/24353/31 "2021-11-08T07:55:25Z")

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Hi @mlw Matt,  
We reported the issue of AT Commands here since May. It will be very great if you can help us on this issue.  
Thank you very much in advance.  
Minh

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