About 2 years ago we moved to cell broadband, the TP-Link TL-MR6400 has been superb over that interval, up until round 1 month ago when it started freezing and or crashing. Usually in our case this involved a loss of web connection, and whenever you log in to the router (which seems still to be working) the standing web page is partially blank. I ought to say that this crash and freeze behaviour has coincided with the CV19 lockdown, which suggests we are running TVs, and three computers by this TP-Link TL-MR6400. I'm also using an exterior antenna. I've tried a few things to solve this drawback. They are just shots in the dark, historyhub.history.gov and a few I am unsure if they've labored, as time will inform. To be clear none have the beneath have labored, I am just checking off choices. This first thing I suspected was some type of power overload (don't mock me I just attempt things out based mostly on imagined scenarios). So I unplug all however one of many ethernet cables, after which used a network switch to take from there. Beforehand I was using all four ports, now simply 1 so did this work? This didn't work. Subsequent I assumed perhaps overheating was inflicting the problem. So I rigged up a "wind tunnel" cooling system, as pictured below. There are vent holes around the perimeter of the casing so air should go by way of the router as well as round it. It is basically a field, to drive air round and by way of the router housing. I used an arctic cooling F12 fan, there was a notable draft through the field, and the previously heat router was stone chilly. This did not fix the problem. Once more, interested by placing much less stress on the router . 3G solely? This can be executed on router config web page. I've just tried that and can report back in a few days. Update: Wow. 3G is admittedly slow. Probably not an choice to put up with that. External Antenna is Causing Crash? I might say no. We had used an inexpensive external antenna for round 1 year, with no issues what so ever. The system had not been changed and yet the problems arose. Does an excessive amount of bandwidth cause a crash? I am unsure, I haven't really seen a correlation. The router typically crashes within the night. This would coincide with watching Tv .