# MangOH Yellow cannot recognize SIMs in slot 1

**URL:** https://mangoh.discourse.group/t/mangoh-yellow-cannot-recognize-sims-in-slot-1/5287
**Category:** mangOH Yellow
**Created:** [September 24, 2020, 7:58am UTC](https://mangoh.discourse.group/t/mangoh-yellow-cannot-recognize-sims-in-slot-1/5287 "2020-09-24T07:58:04Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)
#### Post date: [September 24, 2020, 9:21am UTC](https://mangoh.discourse.group/t/mangoh-yellow-cannot-recognize-sims-in-slot-1/5287/2 "2020-09-24T09:21:11Z")

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seems this is hardware problem, some user does not see this issue on mangoh yellow:

> [@APN will recover when mangOH Yellow reboot](https://mangoh.discourse.group/t/apn-will-recover-when-mangoh-yellow-reboot/4830/3):
>
> Hi jyijyi, Thank you for your reply. I know that “at+cgdcont” can set more APN, but I use mangOH red with WP7702, the APN didn’t recover to “iot.swir” when reboot… How can I freeze the first APN on mangOH yellow? Thanks, Albert

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