# Won't register to network on specific band

**URL:** https://forum.sierrawireless.com/t/wont-register-to-network-on-specific-band/6170
**Category:** MC/EM Series
**Created:** [February 24, 2013, 8:01am UTC](https://forum.sierrawireless.com/t/wont-register-to-network-on-specific-band/6170 "2013-02-24T08:01:35Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![hitchcocknz](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@hitchcocknz](https://forum.sierrawireless.com/u/hitchcocknz)
#### Post date: [February 24, 2013, 8:01am UTC](https://forum.sierrawireless.com/t/wont-register-to-network-on-specific-band/6170/1 "2013-02-24T08:01:35Z")

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Hi there,

I have an MC8790 that won’t register to the network or rather won’t connect to an operator on 850MHz (UTRAN). Seems to be OK on GSM. Running out of ideas about what it could be. Have reset to factory default (at&f) although that doesn’t appear to change most of the band settings etc. Have another MC8790 that seems to work fine with same SIM and hardware. Using ALIX6 board running Voyage linux distribution.

Any thoughts or ideas appreciated.

ati  
Manufacturer: Sierra Wireless, Incorporated  
Model: MC8790  
Revision: K2\_0\_7\_35AP C:/WS/FW/K2\_0\_7\_35AP/MSM6290/SRC 2010/03/04 17:37:08  
IMEI: 358948011120704  
IMEI SV: 16  
FSN: C660511109310  
3GPP Release 6  
+GCAP: +CGSM,+DS,+ES  
OK

SIM OK:  
at+cpin?  
+CPIN: READY  
OK

Signal level OK:  
at+csq  
+CSQ: 24,99  
OK

Band is set:  
at!band?  
!BAND:  
0D, WCDMA 850  
OK

Region has been set correctly:  
at!custom?  
!CUSTOM:  
PUKPRMPT 0x01  
MEPCODE 0x01  
PRLREGION 0x03  
PCSCDISABLE 0x03  
GPSENABLE 0x01  
OK

Modem see’s the operator (and even indicates it is the current operator selected):  
at+cops=?  
+COPS: (2,“Telecom NZ”,“Telecom”,“53005”,2),(0,1,2,3,4),(0,1,2)  
OK

But:  
at+cops?  
+COPS: 0,0,“Limited Service”,2  
OK

at!getband?  
!GETBAND: No Service  
OK

Cheers  
Shane

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### Author: ![Rex\_alex](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@Rex\_alex](https://forum.sierrawireless.com/u/Rex_alex)
#### Post date: [February 27, 2013, 7:02am UTC](https://forum.sierrawireless.com/t/wont-register-to-network-on-specific-band/6170/2 "2013-02-27T07:02:46Z")

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Hi,

When AT!GETBAND? is returning limited service,did you try to rest the module and try to set the ban manually using AT!BAND=02.

Please try with some other firmware(latest) on same hardware.

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### Author: ![hitchcocknz](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@hitchcocknz](https://forum.sierrawireless.com/u/hitchcocknz)
#### Post date: [March 2, 2013, 8:49am UTC](https://forum.sierrawireless.com/t/wont-register-to-network-on-specific-band/6170/3 "2013-03-02T08:49:11Z")

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Hi Rex,

at!getband is returning “no service”. It is at+cops? that is returning “limited service”.

I don’t understand why you suggest at!band=02. The at!band parameters are dependent on the region setting (currently 0x03) and 02 simply defaults to ALL in my case. Maybe you actually mean using at!gband to set the band mask in a bitwise manner?

Cheers  
Shane