I am using the DC112A with an 810S for home internet over 4G. When I first got the device (firmware 1.0.0.24) there was a issue where, when streaming (to twitch/hitbox etc) my ping would spike to around 8-9000 every 15 or so minutes. I called support and within a few days a firmware update (1.0.0.30) which seemingly fixed the issue. However, this firmware update broke the games themselves. Every 20 or so minutes I will suddenly disconnect from the game server. No lag, no indications beforehand, just instant disconnect. Obviously not being able to stream is better than not being able to play certain games at all, however downgrading is apparently impossible on this device and/or firmware.

This issue only seems to happen while playing Black ops 2 or Black ops 3 (Haven't tried other CoD games but I am guessing the issue persists) and does not happen when using the hotspot outside of the cradle. The only thing I can see that these games have in common is that they operate on port 3074, however using a VPN doesn't fix this so it won't be a port issue. I have port forwarded everything, I have tried DMZ and I've confirmed I can see all open ports but the issue persists. It's most definitely a firmware problem.

With 2 different firmwares there have been 2 different problems. Surely this isn't normal for netgear? I am hoping for a firmware update to fix this very soon as I currently can't use my internet properly due to this issue. In the meantime, I don't suppose it's possible to force a downgrade of sorts? Obviously I'd rather not stream than not be able to play the game at all.

Some things I have tried:

Port forwarding
DMZ
QoS
Adding a DD-WRT router in series (a longshot but it was lying around)
Factory reset (both hotspot and cradle)
UPnP on and off on both cradle and hotspot

I'd like to think I am fairly good with networking, so if you need any technical information please ask and I'll try get it for you.

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DC112A Firmware problems