# Unable to Turn RADIO ON

**URL:** https://forum.legato.io/t/unable-to-turn-radio-on/2910
**Category:** Legato Application Framework
**Created:** [December 23, 2017, 8:11pm UTC](https://forum.legato.io/t/unable-to-turn-radio-on/2910 "2017-12-23T20:11:55Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![addy](https://avatars.discourse-cdn.com/v4/letter/a/ecb155/32.png) [@addy](https://forum.legato.io/u/addy)
#### Post date: [December 23, 2017, 8:11pm UTC](https://forum.legato.io/t/unable-to-turn-radio-on/2910/1 "2017-12-23T20:11:55Z")

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I’m using Sim\_Slot 2.,when i trying to make radio on for WP85XX ,it’s not turning on  
root@swi-mdm9x15:~# cm radio on  
root@swi-mdm9x15:~# cm radio status  
Power: OFF  
Current Network Operator:  
Status: Not registered and not currently searching for new operator (LE\_MRC\_REG\_NONE)  
Signal: No signal strength (0)  
PS: Packet Switched Unknown state (LE\_MRC\_REG\_UNKNOWN)  
root@swi-mdm9x15:~#

can you please guide,Thanks in Advnce

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### Author: ![klin](https://avatars.discourse-cdn.com/v4/letter/k/4491bb/32.png) [@klin](https://forum.legato.io/u/klin)
#### Post date: [December 28, 2017, 8:20am UTC](https://forum.legato.io/t/unable-to-turn-radio-on/2910/2 "2017-12-28T08:20:05Z")

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Hi,

Maybe you can try Sim\_Slot 1?  
How about the SIM status by checking with “# cm sim status”

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### Author: ![outbackdingo](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/outbackdingo/32/293_2.png) [@outbackdingo](https://forum.legato.io/u/outbackdingo)
#### Post date: [December 28, 2017, 2:35pm UTC](https://forum.legato.io/t/unable-to-turn-radio-on/2910/3 "2017-12-28T14:35:06Z")

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have you run “cm sim select EXTERNAL\_SLOT\_2”

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### Author: ![ravibabumyself](https://avatars.discourse-cdn.com/v4/letter/r/b9e5f3/32.png) [@ravibabumyself](https://forum.legato.io/u/ravibabumyself)
#### Post date: [January 1, 2018, 8:56am UTC](https://forum.legato.io/t/unable-to-turn-radio-on/2910/4 "2018-01-01T08:56:22Z")

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Hey Addy,

Looks like your modem entered into Low Power Mode. You can check this by sending AT command AT!GSTATUS? on AT command port(/dev/ttyUSB2 normally). You can also check the reason(like FW mismatch, user initiated etc) for modem to enter into LPM mode using AT!PCINFO?

Hope this helps.

Thanks  
Ravindra