SIM8202G-M2 can not connect to 5G networks Raspberry Pi 5G DONGLE Expansion Board

1】Please refer to the steps in the attachment, such as backing up, erasing, and then burning the firmware

https://www.spotpear.com/index/forum/detail/id/143.html

2】other old firmware

https://www.spotpear.com/index/forum/detail/id/140.html

3】source code

https://www.spotpear.com/index/forum/detail/id/141.html

Thank you very much for your support.

I have tried all the version youhave sent but seems the problem is still there . the 5G data class is missing

I am not sure what to do.

This situation might be due to unsuccessful network registration. Follow these steps for troubleshooting:

1】 First, check for hardware issues:

• ] Ensure the SIM card works for calls and internet in devices like phones. Try SIM cards from different carriers to exclude band issues.
• ] Check if the antenna is properly connected.
• ] If the NET light is blinking, it's not registered to the network.

2】Once hardware is confirmed OK, use the following commands (AT LOG) to further check the network situation and screenshot for analysis:

• ] For firmware version: AT+SIMCOMATI
• ] Check SIM card contact: AT+CPIN?
• ] Turn on RF (disable airplane mode): AT+CFUN=1
• ] Set network mode to automatic: AT+CNMP=2
• ] Signal quality: AT+CSQ
• ] Network registration: AT+CGREG?
• ] Connection status: AT+CPSI?
• ] Check APN matches carrier: AT+CGDCONT?
• ] Carrier access: AT+COPS?

We've identified the issue as a firmware problem. It turns out the firmware provided by SIMCOM was missing the qmbn file.

https://drive.google.com/file/d/1G40U_cXf-SZHRfGMxQq24-G8uv_dZ_h0/view?usp=drive_link

All firmware flashing should include this file. Below is the complete firmware that has now been supplemented.

I have update the firmware to the one given below.

Unfortunately the problem still exists

5G is still missing in the data class

Manufacturer:  Qualcomm
Model: 0
Firmware:           MPSS.HI.2.0.3-00269-SDX55_CPEAL
Network type:   3GPP
Data class:           GPRS, EDGE, UMTS, HSDPA, HSUPA, LTE
IMEI:     861164060093285
IMSI:     420050007856028
SIM ICCID:           8996605000078560281F

===============================================

Hi the AT command  AT+SIMCOMATI           

give the below result

The QCN is missing. Can you help me here. What is this and is it needed

Dear Sir,

I have updated the firmware to the latest you sent me. Now I am not able to even connect to LTE

In the network and internet setting the modem says its turned off

In the APN setting there is no APN but I cannot add one

In the AT Commands everything looks ok with airplane mode

After changing the drivers it worked

But still in the LTE network

Below is the AT command LOG

ATi
Manufacturer: SIMCOM INCORPORATED
Model: SIMCOM_SIM8202G-M2
Revision: SIM8202M44A-M2_V1.4.0
IMEI: 861164060093285
+GCAP: +CGSM 
OK
At+simcomati
Manufacturer: SIMCOM INCORPORATED
Model: SIMCOM_SIM8202G-M2
Revision: LE14B03SIM8202M44A-M2
IMEI: 861164060093285 
OK
AT+CPSI?
+CPSI: LTE,Online,420-01,0x3AA0,180047117,333,EUTRAN-BAND8,3700,3,3,-101,-1076,-            808,6 
OK
AT+COPS?
+COPS: 0,0,"Virgin Mobile",7 
OK
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0,,,,,,,,,"",,,,                      0
OK
AT+CSQ
+CSQ: 24,99 
OK
AT+CGREG?
+CGREG: 0,1 
OK 
AT+CFUN=1
OK
at+cnmp?
+CNMP: 55 
OK
AT+CGREG?
+CGREG: 0,1 
OK

1】You need to restore the previously backed-up qcn file, as mentioned in the tutorial.

If you forgot to back up the APN, you can use the APN provided in the attachment.

2】You must correctly configure the APN to register to the corresponding network mode:
AT+CGDCONT=1,"IP","Your_APN"