EP06-E on EP06ELAR04A20M4G DHCP settings change ability lost

IoT Modules LTE-A Module
1

Today i have get few modems with pre-flashed latest firmware for EP06-E

ATI
Quectel
EP06
Revision: EP06ELAR04A20M4G
OK

And there is errors with DHCP change ability:

AT+QMAP="LANIP"
ERROR
Failed

AT+QMAP="LANIP",192.168.10.1,192.168.10.2,192.168.10.2
ERROR
Failed

Can i flash back EP06ELAR04A06M4G firmware to get DHCP change possible?

2

Hello, you can burn it to A06 version for use. The following is the firmware version of EP06ELAR04A06M4G. Please download and use it by yourself.
EP06ELAR04A06M4G.zip

3

According to EP06ELAR04A20M4G Release Notes,

The new firmware version cannot be downgraded to previous versions, otherwise
the module will not be able to work normally.

Is this information valid?

4

How about downgrading firmware, is it safe?

5

Problem with EP06-E still not resolved? Is there newer firmware then with DCHP ECM changeability broken EP06ELAR04A20M4G ???

6

Hi
Can you send me latest firmware EP06ELAR04A22M4G? Is there issue with DHCP fixed?