EG25 Modem - data cnx established but systematic drops after 15/30 minutes

IoT Modules LTE Standard Module
1

modem_firmware_version: “EG25GGBR07A08M2G_30.201.30.201”

This is happening in Cameroon (Africa)
No problem in France / USA

The connection starts with LTE (4G)
Then drops to WCDMA (3G)

SIM is Vodafone (operator seems to be Orange):

+COPS: 0,0,“Orange CM DATA ONLY”
“servingcell”,“LIMSRV”,“LTE”

+COPS: 0,0,“OrangeCaresAboutYou DATA ONLY”
“servingcell”,“NOCONN”,“WCDMA”

We can provide QLog output + our inhouse log

     :::DEVICE INFO:::

part_number: EG25G
serial_number: MPH23EC060009180P
imei: 867929064999834
iccid (or eid): 89314404001268873014
imsi: 204047170214433
phone_number:
apn_registration: Apn1.appareo.com
:::Misc INFOs:::
Device ID : 8297bb410531c2a90776005b029eaeb0b4bf3244
Equipment ID : 867929064999834
IMSI : 204047170214433
Linux Device : /sys/devices/soc0/amba/e0002000.usb/ci_hdrc.0/usb1/1-1
Manufacturer : QUALCOMM INCORPORATED
Model : QUECTEL Mobile Broadband Module
Path : /org/freedesktop/ModemManager1/Modem/0
Plugin : quectel
Primary Port : cdc-wdm0
Revision : EG25GGBR07A08M2G
SIM Path : /org/freedesktop/ModemManager1/SIM/0

2

Hi @Laurent_de_Laprade
Can you confirm whether this sim card works well on other devices in Cameroon? If it works well on other devices, please provide the log captured by qlog, including the network registration and disconnection, so that we can have a look.