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1	1	When you use NB-IoT module and run the command AT+CSG=99,99. It means the device doesn't attached to the NB-IoT network. If attached to network, the first 99 should be 2~~31.
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3	3	(((
4		-Below is the definition for the **AT+CSQ**
	6	+Below is the definition for the (% style="color:blue" %)**AT+CSQ**
5	5	)))
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7		-[[image:https://wiki.dragino.com/images/thumb/5/5d/NB-IoT-CSQ_11.png/600px-NB-IoT-CSQ_11.png||height="644" width="600"]]
	9	+[[image:image-20220530094441-1.png]]
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9	9	CSQ Definition
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11		-In this case, you can check:
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	15	+(% style="color:red" %)**In this case, you can check:**
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13	13	* Whether the antenna connection is good.
14	14	* Whether you use a valid SIM Card
15	15	* Whether you the SIM card place correctly.
16	16	* Whether the NB-IoT Network you use match the End Device Module support network.
17		-* Whether you have select the correct band for your operator. See [[Specify_NB-IoT_Band>>http://8.211.40.43:8080/xwiki/bin/view/Main/Specify%20NB-IoT%20Band/]]
	21	+* Whether you have select the correct band for your operator. See [[Specify_NB-IoT_Band>>doc:Main.Specify NB-IoT Band.WebHome]]
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