# EM91 5G SA connection issues with mbim

**URL:** <https://forum.sierrawireless.com/t/em91-5g-sa-connection-issues-with-mbim/31120>\
**Category:** MC/EM Series\
**Created:** [November 23, 2023, 2:48pm UTC](https://forum.sierrawireless.com/t/em91-5g-sa-connection-issues-with-mbim/31120 "2023-11-23T14:48:21Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\
**Post date:** [November 23, 2023, 10:44pm UTC](https://forum.sierrawireless.com/t/em91-5g-sa-connection-issues-with-mbim/31120/6 "2023-11-23T22:44:12Z")

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No, i don’t, that is why i suggest to try sdk to see if there is any clue

Btw, have you tried to change at!imstestmode

> [@EM9191: how to disable IMS in module? which AT command can do it?](https://forum.sierrawireless.com/t/em9191-how-to-disable-ims-in-module-which-at-command-can-do-it/27996/3):
>
> AT!IMSTESTMODE=1 ERROR

Lastly, have you tried ipv6?

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