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...	...	@@ -162,7 +162,25 @@
162	162	1 NB-IoT
163	163	2 eMTC and NB-IoT
164	164
	165	+=== **4.AT command to set frequency band and network category** ===
165	165
	167	+AT+QBAND=0x100002000000000f0e189f,0x10004200000000090e189f  ~/~/<eMTC_bandval>,<NB-IoT_bandval>
	168	+
	169	+AT+IOTMOD=0  ~/~/ 0 eMTC  1 NB-IoT  2 eMTC and NB-IoT
	170	+
	171	+**Example :**
	172	+
	173	+Taking the use of 1nce cards in **the United States** as an example.
	174	+
	175	+AT+APN=iot.1nce.net  ~/~/set APN
	176	+
	177	+AT+QBAND=0x100180A,0  ~/~/ eMTC ：Set frequency band B2,B4,B12,B13,B25  NB-IoT：No change
	178	+
	179	+AT+IOTMOD=0  ~/~/ Set  eMTC Network
	180	+
	181	+**Setting the above commands in the United States will greatly reduce the network search time of the NB module.**
	182	+
	183	+
166	166	= 3. Configure to connect to different servers =
167	167
168	168	== 3.1 General UDP Connection ==