Question LTE 4G router drops speed randomly ?

Aug 10, 2023
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Hope someone can give me some advice what to do.

I use mobile network in my rural area. I have LTE 4G Mikrotic router. My speed is 20mbps+ and then after 30min, sometimes 2 hours, speed just drops to 0,5-2 mbps, after I restart router speed works normal again 20Mbps+.

My ISP says they done everything they can from their side, and everything is good from their side

I tried wi-fi, LAN cable, different pc, devices, it`s the same, so not a device problem.
I reset router, didn`t help. I have external antenna, antenna is working I checked it in router, and antenna is set as main. ISP gave me antenna because inside room there is bad signal, I need external antenna outside.

I had another router before, there was same problem, but it was very rare, maybe 1-2 times a week, when suddenly speed drops and need to restart router.
ISP changed new router and everything was ok, but still remains that I have to restart router once/twice a week because speed drops. Later problem started ocurring more frequently-restart at least once a day. Now I'm having to restart router 3-6 times a day !

Starting summer there is problem that at evenings sometimes internet is very slow, so slow than you can`t watch youtube, even some pages are loading slow, even restarting doesn`t help.
 
It is strange that restarting the router would change things. Since this happened on other routers it is less likely bad hardware.

I would first see your router has any information about the cell connection. Some of these routers will indicate what tower you are connected to and the signal levels. Does this change when the problem happens. Does it look different when you restart the router.

Time of day issues tend to be other people competing for bandwidth. Now that people do not work from home as much you see much more internet traffic when people get home from work. Could be that tower is overloaded.

When I had a similar setup before I moved I would get ok speed when I connected to a tower I discovered was near a big highway. During rush hour times the ISP would force my radio to connect to a tower that was somewhat farther away but was much slower. My theory is the moving devices on the road are favored over stationary ones. I also suspect that is the tower near the highway was the only tower these device could see. The isp trying to be "fair?" would give those device priority to access the tower I got better speed from. I was thinking about directional antenna so I could not see any other tower but moved and never needed the cell modem.

Unfortunately this is likely some issue in the provider network and you are not going to be able to have much impact on it.