EC-25 Reinitialize everytime Sim-Card

IoT Modules LTE Standard Module
1

Hello,

I have the EC-25E LTE Modem Multiple Units.
There have a problem, that every Sim-Card I try will get this response every 4-5 Seconds


+CPIN: READY

+QUSIM: 1

+QIND: SMS DONE

+QIND: PB DONE

RDY

+CFUN: 1

+CPIN: READY

+QUSIM: 1

+QIND: SMS DONE

+QIND: PB DONE

I also cant run AT Commands during this Time.
I am using German Sim-Cards.

Following Version

Quectel
EC25
Revision: EC25EFAR06A10M4G
2

It has maybe something todo with Running USSD Codes. The Fallback to 2G is going to restart the Modem. Frequenz Band 1800 to 900 changes and it freezes and restarting. Idk why this happens. Need urgently help

3

Hi
It is an honor to answer your question. Please check your power supply problem. It is suspected that the module has been restarted due to a power supply problem

4

How much Ampere does it need?
8 x EC-25-E are connected currently to 5v5a Power Supply