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...	...	@@ -119,10 +119,11 @@
119	119	Fri Feb  7 01:20:30 2020 daemon.info pppd[29452]: Serial connection established.
120	120	)))
121	121
	122	+
122	122	== **2.4 If the following situation occurs, how can users solve this problem?** ==
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124	124
125		-=== **1. The gateway can read the SIM card, But the Internet is displayed as Fail.** ===
	126	+=== **2.4.1. The gateway can read the SIM card, But the Internet is displayed as Fail.** ===
126	126
127	127
128	128	//Users can check whether the APN matched by the SIM card is correct.//
...	...	@@ -132,7 +132,7 @@
132	132	[[image:image-20220718155937-1.png||height="562" width="497"]]
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134	134
135		-=== **2. The gateway can read the SIM card, But the Internet is displayed as Fail, and at the same time Network displays the carrier network.** ===
	136	+=== **2.4.2. The gateway can read the SIM card, But the Internet is displayed as Fail, and at the same time Network displays the carrier network.** ===
136	136
137	137
138	138	//It should be SIM card no flow, users can insert SIM cards into the mobile phone for testing.//
...	...	@@ -140,7 +140,7 @@
140	140	[[image:1658131428288-728.png||height="538" width="494"]]
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142	142
143		-=== **3. The gateway can't read the SIM card, and the Internet is displayed as Fail.** ===
	144	+=== **2.4.3. The gateway can't read the SIM card, and the Internet is displayed as Fail.** ===
144	144
145	145
146	146	//Users need to check whether the SIM card type is suitable for the EC25 module.//
...	...	@@ -148,7 +148,7 @@
148	148	[[image:1658131612484-845.png||height="549" width="499"]]
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150	150
151		-=== **4. SIM display：~*~**SIM ERROR~*~** Check SIM is inserted test SIM in a mobile phone？** ===
	152	+=== **2.4.4. SIM display：~*~**SIM ERROR~*~** Check SIM is inserted test SIM in a mobile phone？** ===
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154	154	//Users can insert SIM cards into the mobile phone for testing.//