Very slow internet connection on 4G modem

Hello,

I have bought a SIMCom SIM7600G-H R2 mPCIe modem and I have configured correctly following the steps of the PDF https://support.industry.siemens.com/tf/ww/en/posts/how-to-use-mpcie-umts-lte-card/251844/?page=0&pageSize=10

I am using IOT2050_Example_Image_V1.1.1.img in the SD card.

Technichal specifications of the modem: https://techship.com/products/simcom-sim7600g-h-r2-mpcie/

I have an IP in wwan0 interface and I can ping www.google.com when I have other interfaces (both Ethernet ports) disconnected. My problem is that the connection is very slow: I can't send a MQTT message to the Cloud broker or I can't upload a 1 KB file to the Cloud because it's appearing me a Deadline error of 60 seconds. I have the antenna installed and the gateway is placed in a office with a perfect coverage.

I have installed a speedtest tool following https://lindevs.com/install-speedtest-cli-on-raspberry-pi/ and I get these bad results: 0,06 MB/s download and 0,06 MB/s upload. Then I have tried the same tool with wired ethenet connection and I get good results: 64,65 MB/s download and 91,90 MB/s upload. 

That's what is appearing in ifconfig command wwan0 part:

And that's the result of mmcli -m 0 command:

I have configured these on "sudo nmcli connection edit cellular-4g":

I think that some configuration will be wrong, because otherwise I don't understand this speed problems.

Can someone help me?

Thanks!

Hello,

I have tried the same configuration with a secondary antenna connected to the AUX connector, but my problem still continues. Do you know how can I change the configuration to communicate via 4G and not LTE? I don't understand very well the differences between 4G, LTE, UMTS...

Thanks! 

Hello, 

I have contacted with SIMCom and they have told me that I had a different APN in AT+CGDCONT? command (different which I configured in set gsm.apn i.euskaltel.mobi), so I think that now the problem is solved.

Thanks!