# I can't register to OUR Private LTE network only using band 28

**URL:** <https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841>\
**Category:** HL78\
**Created:** [March 18, 2024, 8:32am UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841 "2024-03-18T08:32:24Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![helloearth7](https://avatars.discourse-cdn.com/v4/letter/h/59ef9b/32.png) [@helloearth7](https://forum.sierrawireless.com/u/helloearth7)\
**Post date:** [March 18, 2024, 8:32am UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/1 "2024-03-18T08:32:24Z")

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Hi All,

I am trying to connect HL7800EV board to the LTE network using band 28.  
But, I can’t get into the network.  
I’ve got only msg shows all of HL7800EV board has been failed connecting to the network.

AT+KBNDCFG=0,8000000

+KBNDCFG: 0,8000000

OK  
AT+CGDCONT=1,“ipv4v6”,“[xxx.xxxxx.com](http://xxx.xxxxx.com)”

OK

+CEREG: 0

+CEREG: 2

+CEREG: 0

+CEREG: 2

+CEREG: 0

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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:** [March 18, 2024, 10:00am UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/2 "2024-03-18T10:00:17Z")

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did you check the debug log of your private network on why it failed to register network?  
How about setting “IP” instead of “IPV4V6”?  
Is your module OK to register public LTE Cat-M network?

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<div class="post-metadata">

**Author:** ![helloearth7](https://avatars.discourse-cdn.com/v4/letter/h/59ef9b/32.png) [@helloearth7](https://forum.sierrawireless.com/u/helloearth7)\
**Post date:** [March 19, 2024, 6:17am UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/3 "2024-03-19T06:17:03Z")

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I will go down to Test Facility to do it and I will share the result.  
Thanks.

Is ther any way to configure the HL7800 module to use Band 28 B range?  
the freq. range of B is

- Uplink Frequency: **718-748 MHz**
- Downlink Frequency: **773-803 MHz**

TY.

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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:** [March 19, 2024, 6:34am UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/4 "2024-03-19T06:34:06Z")

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didn’t you already set +KBNDCFG ?  
You might also need to check +KSRAT.

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<div class="post-metadata">

**Author:** ![helloearth7](https://avatars.discourse-cdn.com/v4/letter/h/59ef9b/32.png) [@helloearth7](https://forum.sierrawireless.com/u/helloearth7)\
**Post date:** [March 19, 2024, 1:54pm UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/5 "2024-03-19T13:54:54Z")

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Yes, it has been configured with +KBNDCFG=0,8000000, and there is a response of 0 to the +KSRAT command. I was wondering if there is a more in-depth method for setting the A/B range of Band28 frequency.

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<div class="post-metadata">

**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:** [March 19, 2024, 2:05pm UTC](https://forum.sierrawireless.com/t/i-cant-register-to-our-private-lte-network-only-using-band-28/31841/6 "2024-03-19T14:05:35Z")

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no, i don’t see such setting