I would also like to add my two cents about this product, because there are quite a few reviews with speedtests showing 300–500+ Mbps that may create the wrong expectations.

TL;DR: If you are looking for stable speeds of 250 Mbps+ in an urban/suburban area, this antenna is not for you. The tests showing such speeds are usually done at dawn, when the tower is empty or if the tower has no load at all in some area, which is impossible to know without trying it with one of these devices. During peak hours you will see 100–150 Mbps.

This antenna has a parabolic shape, designed for maximum gain over long distances. It is ideal for last-mile deployments, houses in the mountains or remote areas with the nearest base station 10+ km away, where without an external antenna you get 10–20 Mbps on your mobile. In these cases, the LHG can give you 80–100 Mbps, which is just fine for a house with Netflix and browsing.

However, if you are in a city or suburb with a base station 2–5 km away, you will gain almost nothing compared to a simpler solution.

My own experience with the antenna, I am 2.2 km from the tower, with excellent signal:
RSRP: –74 dBm (excellent)
SINR: 11 dB
Full 4CA aggregation: B7@20 + B3@20 + B7@10 + B3@15 MHz (65 MHz total bandwidth)

Nevertheless, in the speedtest I get only ~100 Mbps download. Essentially, my antenna is "shouting in the ear," but the tower is distributing the bandwidth to dozens of users simultaneously.

The proof that the problem is not the tower came when I bought the MikroTik 5G ATL R16.

On the exact same tower (phy-cellid 94), I get 790 Mbps download and 107 Mbps upload. The 5G device aggregates n78@100 MHz + n78@50 MHz along with the LTE bands, and utilizes bandwidth that the LHG cannot see due to the 2x2 MIMO and the fact that it is exclusively LTE.

This proves that the tower can handle it, the bottleneck is the antenna itself and the fact that LTE 4G is now overloaded.

The LHG LTE18 is an excellent tool for what it was designed for: long-range connection in rural/remote areas. If your nearest tower is 10+ km away, it will work wonders.
But if you are in a city/suburb and expect 300+ Mbps because you saw it in some review, take a look at the ATL models with 4x4 MIMO, or even better, the 5G models if your tower supports NR. The difference is dramatic.

The antenna was purchased to be installed in a cabin on a mountain at 1500 meters altitude.
The location is hard to reach, there is no spot with good and unobstructed visual contact with the antenna, and mobile phones only have signal in specific places.
I have directed it towards the antenna but there are trees blocking the way.
Nevertheless, I have a trouble-free internet connection with the speeds you can see in the photo!
I am very satisfied with the purchase and I highly recommend it for installation in areas with problematic coverage.

A little difficult to set up. It increased my speed from 40 Mbps to a maximum of 130 Mbps in a fairly remote area. No disconnections!

Summary Review:
(Read only this if you just want a quick opinion)

The Mikrotik LHG LTE18 is a very good option for a 4G LTE "antenna," especially when the signal strength in your area is insufficient for most devices. It is a high-quality construction, easy to install, with extremely advanced capabilities if you need them, stable operation, and most importantly, unbelievably fast speeds! I use it for gaming among other things. Compared to ADSL lines, it is much more stable, with no problems at any time. I highly recommend it, and I would also recommend an Unlimited Data Plan. ;)

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Technical Information:

- Purchased on 11/15/2022
- Installed on a rooftop (see photo) in an area near Mesolongi.
- The provider I use is Cosmote.
- The Tower ID I connect to is: 102103 (for CellMapper)
- I use bands 1/3/7. (1 Main + 3CA)
- Currently, I have not purchased a corresponding router, so the LHG handles the routing.
- I use the latest RouterOS 7.6 (at that moment) with up-to-date RouterBoard + Modem firmware.

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Detailed Description:

Advantages:
- The design with the dish enhancing the signal works very well, even in areas where you can't even get a phone signal! A strong and healthy signal is not only desirable for high speeds but also for a stable connection without interruptions or micro-disconnections.
- The LTE18 modem is extremely fast, with a maximum THEORETICAL speed of 1.2Gbps, while in realistic scenarios it is about half of that. This CLEARLY depends on your provider as well. The way the modem achieves these speeds is by combining different bands. It connects to more than one "transmitter" on the provider's antenna.
- Its installation is extremely easy if you have at least a screwdriver. It also depends on how you will mount it. USUALLY, the best solution is a mast or pipe with a diameter of 45-70mm. I would not recommend it on very thin pipes, as it may twist in the wind. (It comes with its own clamps, as well as an adapter for tilting up/down)
- It is powered via PoE, and the package includes an adapter and the necessary power supply. This means that you only need ONE cable from inside your house to the LHG.
- The device runs Mikrotik's firmware (or operating system, as I would call it), known as RouterOS, which has many, many features for almost every user. I am NOT EVEN the right person to explain them to you, but from what I have seen, if you think you need something, it PROBABLY already exists as a function! :D

Disadvantages:
I wouldn't say that this machine has any disadvantages per se, but it is worth mentioning that:
- It needs to be permanently installed somewhere outside. You also need to know where you "receive a signal" from. You can find this information on the CellMapper.com website. So, although the installation is not difficult at all, it takes a little time.
If, of course, the signal in your area is strong enough, then Mikrotik has another range of products, the "Chateau" Modem-Routers, also 4G LTE or even 5G. They are much easier to install and have extra capabilities.
- Its operating system, which I mentioned above, is extremely rich but a bit complex (I would say) for beginners users.

LUCKILY ( !!! )
a) It comes with a "pre-installed" Default Setup, which with a few adjustments (SIM PIN / APN etc.) works fine.
b) IF in the end, you need to change the setup, the community around these devices is very supportive and the documentation is quite rich.
c) There is also Greek content on YouTube, A-Z content about these devices, on the channel "Instatech PRO". You will definitely find valuable help.
d) I would recommend buying such devices from somewhere that offers support.

I hope I didn't tire you.
Happy shopping and happy surfing! ;)