Hello,
We are facing new issue with EC200U-CN. Some SIM cards doesnot work with EC200U-CN and some works of same operator. I have 2 SIM cards of Jio operator here in Maharashtra, India. 1 works fine with EC200U-CN but other doesnot. Whereas both works well in mobile phone. So I have captured the screenshot of the QNavigator for more information.
/* Use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2025-07-26 15:31:07:346_S:] AT+CPIN?
[2025-07-26 15:31:07:348_R:] AT+CPIN?
[2025-07-26 15:31:07:351_R:] +CPIN: READY
[2025-07-26 15:31:07:351_R:] OK
/* Use AT+CSQ to query current signal quality */
[2025-07-26 15:31:07:352_S:] AT+CSQ
[2025-07-26 15:31:07:356_R:] AT+CSQ
[2025-07-26 15:31:07:356_R:] +CSQ: 23,99
[2025-07-26 15:31:07:356_R:] OK
/* Use AT+CREG? /AT+CGREG? to query the network registration status. */
[2025-07-26 15:31:07:357_S:] AT+CREG?
[2025-07-26 15:31:07:364_R:] AT+CREG?
[2025-07-26 15:31:07:364_R:] +CREG: 0,2
[2025-07-26 15:31:07:364_R:] OK
[2025-07-26 15:31:07:365_S:] AT+CGREG?
[2025-07-26 15:31:07:369_R:] AT+CGREG?
[2025-07-26 15:31:07:371_R:] +CGREG: 0,2
[2025-07-26 15:31:07:371_R:] OK
/* Use AT+COPS? to query current Network Operator */
[2025-07-26 15:31:07:381_S:] AT+COPS?
[2025-07-26 15:31:07:382_R:] AT+COPS?
[2025-07-26 15:31:07:383_R:] +COPS: 0
[2025-07-26 15:31:07:388_R:] OK
What could be the problem? where is the issue? This same SIM works in mobile phone.
When I tried with other JIO SIM card it works well. Here are the responses for AT commands
/* Use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2025-07-26 15:39:00:820_S:] AT+CPIN?
[2025-07-26 15:39:00:822_R:] AT+CPIN?
[2025-07-26 15:39:00:823_R:] +CPIN: READY
[2025-07-26 15:39:00:823_R:] OK
/* Use AT+CSQ to query current signal quality */
[2025-07-26 15:39:00:825_S:] AT+CSQ
[2025-07-26 15:39:00:826_R:] AT+CSQ
[2025-07-26 15:39:00:828_R:] +CSQ: 24,99
[2025-07-26 15:39:00:828_R:] OK
/* Use AT+CREG? /AT+CGREG? to query the network registration status. */
[2025-07-26 15:39:00:835_S:] AT+CREG?
[2025-07-26 15:39:00:838_R:] AT+CREG?
[2025-07-26 15:39:00:840_R:] +CREG: 0,5
[2025-07-26 15:39:00:841_R:] OK
[2025-07-26 15:39:00:845_S:] AT+CGREG?
[2025-07-26 15:39:00:851_R:] AT+CGREG?
[2025-07-26 15:39:00:851_R:] +CGREG: 0,1
[2025-07-26 15:39:00:851_R:] OK
/* Use AT+COPS? to query current Network Operator */
[2025-07-26 15:39:00:854_S:] AT+COPS?
[2025-07-26 15:39:00:857_R:] AT+COPS?
[2025-07-26 15:39:00:860_R:] +COPS: 0,0,"JIO 4G",7
[2025-07-26 15:39:00:860_R:] OK
Please help.
Thanks and Regards,
Neeraj