Huawei B525 Router, Sorensen 1800MHz Antenna - Improved SINR & Internet Quality on 2600MHz Band?

Hello,

Some time ago I changed the LTE mobile internet operator due to better coverage, transfer and lower network load during peak hours. Internet when it comes to downloading and uploading works quite well and almost enough for my needs.

I have a Huawei b525 router and a Sorensen 1800MHz external antenna, and here is the problem. On the previous operator, the 1800MHz band was fine, but my current transmitter (200-300m in a straight line) sends internet in the 2600MHz band. Reading the parameters of my range, everything seems fine except for the SINR indicator which is low and jumps from 4 to 10 dB. In addition, RSRQ still jumps from -4 to -9dB. My problem is not the speed of the internet but its quality, sometimes I can lose packets in some games (not bad ping) and here the question is: will buying a new antenna receiving the 2600MHz band improve anything in the quality of the internet? Is the antenna really responsible only for the range, which is really nice and it will not help me with these unfortunate lost packages?

In the attachment I put all the Internet parameters, I hope that someone will be able to answer my question

The signal is very good, are the problems only in the evening and then disappear until the next evening? Low SINR may indicate BTS load.

And why the antenna at a distance of 200m from BTS at Warszawska 121? Signal parameters very good.

The transmitter is close, the range is fine but without the antenna from my apartment there are already problems (low, almost like a basement) so even on this mismatched (I think) antenna there is a noticeable plus (downloading / sending). I'm just wondering about the jumping SINR, and it is very different when it comes to losing packages. Sometimes around 19-21 I don't lose them at all, and sometimes even outside of rush hours they get lost somewhere and I can't explain it. I read a bit about these parameters but this is only quick knowledge of the Internet, I am still a layman in these matters

Does anyone know if changing this antenna will improve anything because I did not get an answer. Yesterday I tried to use the internal antenna and performance was worse (above all ping a lot higher). I'm tossing a new screen with range parameters. Sunday, 12:00 o'clock so there shouldn't be too much overload of the transmitter, and yet the SINR does not knock, and the RSRQ jumps like crazy from -4 to -9dB (but this is still a pretty good result).

Disconnect the antenna for a moment and see if it will be the same.

After disconnecting the RSRQ and SINR antennas continue to jump, the only change is to change RSSI from around -50 to -80/90.

The antenna carries the signal pickup point outside, although it is not dedicated to the 2600MHz band. SINR changes are the effect of loading this band on your LTE2600 T-mobile sector on BTS near Warsaw. A 2600MHz antenna dedicated to this band will improve the signal and stabilize the connection, but it is difficult to predict whether it will affect speed, ping.