I have a Proxicast b07zbvx8vl 2x2 MIMO antenna that I’m using with my older GL-X750 version 1 4G modem. The antenna supports 5G from 600-6000 MHz range.
Can I use this antenna with the newer GL-X3000 which has ports for 4x4 MIMO, with the other two cell antennas removed?
You can connect this Proxicast antenna to the X3000 MAIN and DIV Cellular antenna connectors, and still keep the other two Cellular antenna connectors (MIMO1 and MIMO2) with the original paddle antennas.
The reason is LTE signal only uses MAIN and DIV two antennas, but 5GNR signal must use four antennas in some cases.
Good info Tim,
I will soon be deploying a Parsec Akita 4x4 Mimo that features outputs labeled 1-4. Safe to assume that #3 & #4 go to MIMO 1 & MIMO 2?
Parsec Akita antenna 4 cables can connect to any of the GL-X3000 cellular antenna connectors, don’t need to mind the sequence, as each antenna supports 600M~6GHz frequency.
Excellent information, all, and exactly what I was looking for. Thank you for having been here! After much research I have finally ordered the GL-X3000 and I am planning on using the same antenna config as @jay1 since I already own one of those and I do not plan on obtaining a second one or a new 4x4 MIMO antenna just yet. I am hoping this works well enough in the areas I travel to 
Wanted to give a 
for this post and also ask @jay1 how it worked out and whether he learned anything else regarding this setup I might need to know. Thank you!
Hello, I am in the United States and have been using the X3000 for cellular internet at tradeshows all over the country and it has been working great. However the TSA (Transportation Security Administration) has lost one of the 5GNR antennas during their search of my electronics case. Where can we buy replacement antennas for the X3000? I need at least 1 but would love to be able to buy the whole antenna pack (qty 4 - 5GNR antennas and qty 2 - Wifi antennas so that we have them to replace when needed. Thank you.
Also, of the 4 different 5G antenna connection ports on the X3000, which are the "most important" and the priority of you are missing some antennas or have "better" antennas but not all matching which ports should be connected first as the highest priority? Like in my situation where 1 of the 5GNR antennas are missing and I only have 3 antennas now (for cellular), which port should I NOT have an antenna so that I can get the most functionality for 5G areas?
Thank you for using our 5G router. We hope it can satisfy your requirement in terms of performance and stability on tradeshows.
We can ship a set of antenns to you, please send email to support@gl-inet.com with your shipment address.
For 4G LTE signal, the Main and Div two antennas are important.
But for 5G signal receiving, all 4 antennas will be used, each one is used to receive/transmit different band signal.