How to read and improve your LTE signal 

Yes, this is a good strategy. www.cellmapper.net/map is an excellent site

What about using apps like OpenSignal to find a near cell tower?

most of the time it works, sometimes prepaid sim cards are "low priority" so speeds might differ.

Like the other comment says, LHG contains the router too. It's not an antenna, it's a router+antenna 2in1

@@mikrotik Wait a minute.. I thought that this was just an LTE modem that it was need a router at the end of the Ethernet to share the connection.. So Is Lhgg a modem-router device or just a modem one? So if I connect a switch at the Ethernet, will the lhgg share ips like a router via DHCP?

Those features are turned on automatically, there is no need to set them up

@@mikrotik if You reboot the router/antenna - channels used for communication might change (if not locked) ... so please add this information

It is impossible to tell what happens without deep investigation. It is very likely your operator disconnects you from those bands for some reason.

Testing at night could cause false results if your operator is saving energy. Here in Finland all operators do some kind of energy saving at nights. Others shut down some frequencies and others shut down MiMo on their base stations during night time.

@@MikkoLundahl In Poland we have best speedtest at night when is low count of users, good time to test max speed. Each country have differ spef. Differ bands and CA matrix. Some ISP even use QoS and many CA not change anything. My scripts give me way to discover that cell's who are working, give some speed and then I have proper cells to focus signal on them. I use LDFR+EM12G mostly.

@@SiBex_ovhcan you share these scripts? They sound fantastic

Choose a MikroTik device with a higher CAT modem, they are able to work in multiple bands at the same time, with the same number of antennas. For example LHG LTE18 supports this feature

@@mikrotik i have ATL LTE 18 (ATLGM&EG18-EA, 4x4 MIMO) so its capable. I assume network operator could be blocking it, and question is: is there a way to trick operator to use 4 bands/ more antenas? i tested in firewall TTL setting to add 64/65 but it did not impact speed. So is there another thing i could do to improve my speed and use more bands/antenas. (my RI is 1 or 2 - would like to see 4 :) )

@@mikrotik I own one. It's gorgeous, it works very well. I was thinking of making a switch to 5G with a better performing antenna. But this time I don't want to put it on the terrace of the house...possibly on my balcony. I live on the 4th floor and I can see the BTS. There are no obstacles between me and the Tower. The exception is some other buildings that have one floor more than mine. i.e. a 5* or 6th floor but to be sure I would have to do some test measurements. I had spotted the Chateau 5G but they are too expensive. Do you have anything cheaper?