AirMaster 3100V vs Greenpacket DT-350

مقایسه AirMaster 3100V و DT-350 با سیم کارت ایرانسل آنلاک

In this post, I am going to compare AirMaster 3100V (Software Version: V2.0.0B31) and GreenPacket DT-350 TD-LTE modems. They both support Band 42 which is used by some companies for providing TD-LTE internet, such as Irancell and Mobinnet in Iran.

To do the test, I put the modems in the same location at about the same time and made the tests.

I used the same Irancell simcard on both modems. It is possible to use an Irancell simcard on the AirMaster 3100V modem provided by irancell however you first need to allow it in modem settings (192.168.1.1/lte/simcardinfo.asp) as explained here. The common Root passwords (note that both the username and password are case-sensitive) for this airmaster modem is mentioned here and here :

PWDd0N~WH*4G#DN

R0Br0o^S85~LT3@MN

RoBJ@!M85~LT3#95*MN

It is not possible to use a mobinnet simcard on a DT-350 modem provided by Irancell as the modem does not allow it.

Here are the results, for AirMaster 3100v modem with an Irancell simcard:

and for DT-350 with the same Irancell simcard in the same location:

We see that AirMaster 3100V had a better performance compared to the DT-350 modem.

How to do MTU discovery on Linux and Mac

To find the optimal MTU for your network, you need to find the maximum packet size you can send through it. 

on Mac  use the following command to send ping packets with a MTU size of 1500 :

ping -D -s $((1500-28)) -c 1 1.1.1.1

and on linux use:

ping -M do -D -s $((1500-28)) -c 1 1.1.1.1

To find the default MTU that is set on your device, use the following command on linux 

ip -d link list

and on mac use :

networksetup -getMTU en0

ifconfig should also show the default MTU for your network interfaces.