I'm sorry for the last message, I think the text formatting was misconfigured. If there is any doubt just let me know.
One thing I haven't mentioned yet is the modem's light-on pattern, which I think is a little odd.
Since we started having connection problems, the only light on the chip is the 3G light, even though we are in a 4G coverage area. It flashes slowly, 4G does not light up.
The signal strength lights are fixed on 2 (of 3) bars.
No lights on SIM1 SIM2 WIFI ETH, in the WAN field.
Below, the POWER, WIFI 2.4 and 5 lights are permanently on.
If possible, I can send photos and videos of this standard, as well as the modem's operating system.