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23	23	[[image:image-20220527153544-2.png]]
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26		-= 2. How to Trouble Shooting if Cellular connection fails =
	26	+= 2. How to Debug if Cellular connection fails =
27	27
28	28
29	29	If there is a problem with the cellular connection. Please check the below points:
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163	163
164	164	[[image:https://wiki.dragino.com/xwiki/bin/download/Main/Notes%20for%20cellular%20network%20connection/WebHome/image-20220527153827-5.png?rev=1.1||alt="image-20220527153827-5.png"]]
165	165
166		-
167	167	=== 2.2.2 Check cellular info ===
168	168
169	169
170		-**Below command can check if you have a SIM card inserted, or via Web UI**
171		-
172		-* Make sure to Power Off when you insert the SIM card and power on the device. The SIM card slot of the gateway does not support hot swap
173		-* Make sure you have the correct direction to insert the SIM card. Every device has an example photo in the manual for the direction.
174		-
175		-[[image:image-20241231153947-1.jpeg||height="287" width="968"]]
176		-
177		-
178	178	run "**quectel-CM**" in gateway CLI
179	179
180	180	(% class="box infomessage" %)
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271	271
272	272	(% class="box" %)
273	273	(((
274		-root@dragino-2d5d26:~~# quectel-CM -s 3gnet
	265	+root@dragino-2d5d26:~~# quectel-CM
275	275	[12-05_07:32:57:187] Quectel_QConnectManager_Linux_V1.6.0.24
276	276	[12-05_07:32:57:191] Find /sys/bus/usb/devices/4-1 idVendor=0x2c7c idProduct=0x125, bus=0x004, dev=0x002
277	277	[12-05_07:32:57:192] Auto find qmichannel = /dev/cdc-wdm0