MIFI LTE very slow

I get 18~25Mbps down and 5~10Mbps up with an 18,99 signal?

When I have a 29~30,99 signal, I’ve gotten 50Mbps+ and like 30Mbps up. What carrier? Is there a way to see what band the Quectel is using?

Really?! are you using in Hong Kong? my mifi is running ec25-e, I tested 4 x ISP, but no one can get over 10Mbps. and two never connected.

Smartone - cannot register
Three HK - cannot register

No, I’m in the US. I get the same speeds with TMobile, too. Dunno what to tell you? Try another brand of antenna? I’ve heard some are junk.

always installed external antenna, if using internal antenna all below 5 Mbps.

What DB are the antenna rated at? What frequency do they cover? Not all LTE antennas can do 700Mhz, etc. Make sure the antennas match the bands that are available. 2.5Ghz gets seriously attenuated in buildings. I had 55Mbps down in the front yard, and I went in a house, and got half that. Whereas 700Mhz only did 35Mbps outside, but did the same inside. I went through 5 pairs of antennas before I found some I liked.

Also, make sure it’s in QMI mode. Well, over here that works better. Not sure about over there.

edit: If those providers are relying on carrier aggregation just to get to 30Mbps, that’s not the modem for you. You need to find out how they operate, and compare the service on the MIFI to a phone of comparable modem tech (cat 4/6, etc).

Also, about the dongle modem, if the drivers are installed in OpenWRT/LEDE, then it should just work. I tethered a Unite Explore into the MIFI over USB, and then load balanced the two. The Unite Explore can do carrier aggregation, and was a bit faster, so I was getting over 65Mbps since they upgraded the towers near me. That was with a speed test that was multiple connections, I think 8+, to take advantage of the balancing.

Configuring Mwan3 is fun (not really), but it works well once you figure it all out.

If you plug anything into the USB port, make sure the power adapter for the MIFI is putting out at least 2A, or it might get unstable.

For E3372, just plug to the USB-A of MiFi and you can configure tethering.

Be sure to have the power adapter plugged in. The modem consumes a lot of power .

The antennas ranged 700 ~ 2700 MHz with 38Dbi as per advised, I did tried another antennas that GLnet sent to me, however, 2 x ISP still not registered, I guess SIM locked or something I still have no idea, those SIM are worked fine on other 4G router which is Netgear 810S, the reason why I bought MIFI that can use VPN and TOR. but seems I still have to learn about the configuration.

Regarding to this ISP, seems look registered, but never connected.

It is very disappointed that MIFI’s performance is very poor, I tested same SIM card on MIFI and Netgear 810, the result are big different, mifi is slowed down even signal at around 20~25, what next I can do?

Netgear 810:


38DBi is unlikely from an antenna design like that. Those are usually 6~9DBi. I bet those antennas are not engineered very well. Get some name brand antennas, like Peplink, Sierra Wireless or Proxicast, etc.

Also, make sure the APN is set correctly.


We will test the following carriers and let you know. We are in HK and we have tried this carriers before and they work and the speed should be above 20Mbps at least.

Smartone - cannot register
Three HK - cannot register

Thanks, lucidtek, I ordering proxicast 3-5 dbi from amazon, hope that can fix the problem.

Those SIM are work great on Netgear, as above picture, but mifi running slow, actually I have 2 x mifi, both are the same result, that’s why I really want to fix this rather than buy another router.

glad that i didn’t spend that unacceptable rip off from alibaba portable LTE sellers.
I knew it won’t work,
just wait until real engineers make one for dedicated US LTE. currently they all are using same chip that only contains 30% of cheap old US bands.

Hi when is the new antenna ready? Will the internal antenna have two antenna in one to plug into the main and diversity connector?

The MIFI’s board/processor/drivers aren’t the problem. I think it’s mostly the antenna, then the carrier, then the plan you have.

These results are with a 31,99 on signal strength while pointed at the tower with a directional MIMO antenna, during a period of little congestion, with a SIM that does not get deprioritized or throttled. The computer is connected via ethernet, not WIFI, for these tests. These numbers are on par with the Unite Explore tethered to the PC via USB, with the same antenna.

This is with a CAT6 LTE modem inside. The slower speeds are a Nighthawk M1 with no external antenna over mesh. Over ethernet, the M1 does over 100Mbps down since the tower upgrade. This is on AT&T.

I’m very disappointed with this device! For example, in the same place TP-link mr3020 20$ huawei E3372 30$ - down 50 up 30. Mi-Fi down 3 up 2


We don’t know which plan, which carrier, which antennas, which bands, which tower, is it over WIFI or ethernet, on top of how the MIFI is configured…

So it’s obviously not user error.

Old thread, but was this ever resolved and a solution found?

I have just received a MiFi with EP06-E (Cat 6) for testing here in Australia. The EP06-E covers all major bands here in Oz.

Where on a Cat 4 Mifi (ZTE MF910Z and Alcatel MW41) I get around 30+ Mbp/s with the GL-MiFi I’m only getting 9-13 Mbps for 2 different Telcos.

Is it just the antennaes that’s the issue or is it something “deeper”?

Both the Cat 4 MiFi’s cost me about $25 AUD each. Hard to currently recommend the GL-MiFi at 6 X the price.

If we start recommending the GL-MiFi in Australia working like this, GL-iNet’s reputation will not be good :frowning:

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