@tom thank you for your response. I think I have newer image

system-image: 1.4.1-M0054-14.1a-perf
kernel: #1 SMP PREEMPT Thu Oct 13 17:48:16 UTC 2022 4.19.125

hw version: M0054

voxl-suite: 0.9.4

@IFTEKHAR-HASAN I also updated the AT command on voxl-modem-start.sh to connect to LTE but I am getting error with AT command as seen in "systemctl status voxl-modem"

Can you let me know if you see any issue here . or does the AT command has any issue?

That's what my understanding is too based on the datasheet. But how do I make the quectel modem only look for LTE . I used below command to set LTE only mode but it didn't work

echo -ne "AT+QNWPREFCFG="mode_pref",LTE\r" | busybox microcom /dev/ttyUSB2

Is there any internal configuration or config file that is overriding user command

I looked at the data set and it does support LTE B4 . I do see the device is getting an IP address on LTE B4 but not successful in setting up LTE session ( no bearer setup) and instead tries to measure 5G network for 5G NSA connectivity. We don't want Quectel modem to search for any 5G network and our test setup requires 4G network . I tried to set mode to LTE only using below AT command from the adb shell window but the modem still tries to connect to 5G network and not completing LTE session setup( no bearer setup happened) .

echo -ne "AT+QNWPREFCFG="mode_pref",LTE\r" | busybox microcom /dev/ttyUSB2

How can I make the quectel 502Q-AE modem to only connect to LTE

@Vinny thank you Vinny. I appreciate your response and it does clarify the doubt.

HI , I have a general question. Our Modal AI VOXL2 has a Quectel RM502Q-AE . Does it only support 5G SA & NSA or can the device connect to LTE band ( B4 for example) ? I noticed that Quectel AT command provides option for both 4G/5G mode preference and datasheet suggested it supports LTE band

echo -ne "AT+QNWPREFCFG="mode_pref",LTE:NR5G\r" | busybox microcom /dev/ttyUSB2

We have a modal AI Voxl2 with QUECTEL RM502Q-AE and I am trying to connect it to our LTE network . ON QUECTEL RM502Q-AE datasheet, it shows support for both 5G & 4G and we want drone to connect to LTE B4 which is supported. We used below AT command to set LTE only mode and configured custom APN for quectel modem from the selection using voxl-configure-modem

echo -ne "AT+QNWPREFCFG="mode_pref",LTE\r" | busybox microcom /dev/ttyUSB2

On the network side, I didn't notice any LTE connection attempt. Is this the correct procedure to configure modem to LTE only for QUECTEL RM502Q-AE?

Another question is that in your forum, it shows LTE connectivity through V2 add on board . Does it mean QUECTEL RM502Q-AE doesn't support LTE ?