# EM7455, Deactivate Low-Power-Mode

**URL:** <https://forum.sierrawireless.com/t/em7455-deactivate-low-power-mode/8620>\
**Category:** MC/EM Series\
**Created:** [June 12, 2016, 6:49pm UTC](https://forum.sierrawireless.com/t/em7455-deactivate-low-power-mode/8620 "2016-06-12T18:49:43Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![fs1](https://avatars.discourse-cdn.com/v4/letter/f/439d5e/32.png) [@fs1](https://forum.sierrawireless.com/u/fs1)\
**Post date:** [August 10, 2016, 3:46pm UTC](https://forum.sierrawireless.com/t/em7455-deactivate-low-power-mode/8620/18 "2016-08-10T15:46:40Z")

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> [@Barton](#):
>
> Privileges have a password “A710” not enough.  
> For solutions need used engenering mode, by AT!OPENLOCK…
> 
> Example, for my Sierra EM7305:
> 
> === activate FCC\_AUTH ===
> 
> ```auto
> at!entercnd="A710"
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 0
> Auth enabled: 0
> Lock state: 0
> OK
> 
> AT!PCFCCAUTH=1
> ERROR
> 
> AT!OPENLOCK?
> 8101A18AB3C3E66A
> OK
> AT!OPENLOCK="D1E128FCA8A963ED"
> OK
> 
> AT!PCFCCAUTH=1
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 1
> Auth enabled: 0
> Lock state: 0
> OK
> 
> AT!RESET
> OK
> 
> -- after reset---
> 
> at!entercnd="A710"
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 1
> Auth enabled: 1
> Lock state: 0
> OK
> ```
> 
> === deactivate FCC\_AUTH ===
> 
> ```auto
> at!entercnd="A710"
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 1
> Auth enabled: 1
> Lock state: 0
> OK
> 
> AT!PCFCCAUTH=0
> ERROR
> 
> AT!OPENLOCK?
> 9F618EF3F0FCE7CE
> OK
> AT!OPENLOCK="CFE6B46892423A75"
> OK
> 
> AT!PCFCCAUTH=0
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 0
> Auth enabled: 1
> Lock state: 0
> OK
> 
> AT!RESET
> OK
> 
> -- after reset---
> 
> at!entercnd="A710"
> OK
> 
> AT!PCFCCAUTH?
> NV setting: 0
> Auth enabled: 0
> Lock state: 0
> OK
> ```

Thank you for this post, I can’t get into the “engenering” mode with at!unlock, I think this may be a challegene-response sequence. As it changes with every at!unlock? command.

```auto
AT!OPENLOCK?
6FF19EEBB325DB2D

OK
AT!OPENLOCK="CFE6B46892423A75"
ERROR
```

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