@Solla-topee 

The Router is an Asus RT-AX56U, and the C120 is showing a -48 RSSI signal on it's 2.4ghz network (WiFi6 is disabled, so it's currently in AC mode).

No issues with any other devices on the network and our bandwidth is fast enough for multiple TV's to stream programming at the same time.

The video lags and halts when remotely viewing either a live stream from the camera, or playing back a detected clip from it's Samsung 128gb High Endurance Micro SD card.

The camera is set to detection mode of Pets, Vehicles and People and capture to SD card only.

Oddly enough If I record playback of a detected clip which is lagging and stopping during the recording, the downloaded clip then plays back fine from the same cell connection.

For that reason it will be difficult to show provide a clip showing the issue, as I'd have to record the app on my phones screen somehow.

  @Solla-topee 

I have tried Hardware Acceleration On and Off, with no improvements.

Also tried UPnP which seems to give a faster remote network connection to the camera, but doesn't fix the lagging/stuttering Live Video/SD Playback issue.

(The app doesn't specify which ports should be open for the camera with UPnP)

UPnP is widely regarded to be a security exposure however.

A better solution is Port Forwarding, but I'd need to know which ports are required.

  @TP-Mark You're not alone I have the same problem. I have wyze cameras and Arlo cameras. Both have no problem live viewing when I'm away from my house. c-120s work great at home but when I'm out and about, c120s don't work well. My router is Google mesh My upload and download speed at home is 300 300 fiber optic. My wireless carrier is Verizon Wireless.

  @Jjl290 

Sorry to hear that as I really wanted to like the C120, since the 2k video, on camera AI and detection is better than my Wyze Cam V3's.

I have a Tapo 520WS coming tomorrow and may try a wired doorbell. (hoping they are much better at remote live/clip playback).

I think this is either a slow processor (converting video images to MP4), or an on camera wifi chip with hiccups.

Wyze has better shortcut, scene and automations for things like notifications you don't want while home, without stopping recording entirely. (privacy mode).

Hopefully Tapo improvements are coming though:  https://community.tp-link.com/en/smart-home/stories/detail/502100

  @Solla-topee 

I do not use a VPN on the phone, or on my home network.

Our home network is robust enough for multiple HD streams at the same time, and also works fine for live HD programming.

Also, a Wyze cam on the same network doesn't have this stuttering issue.

The attached recording was taken in Live View mode from my cellular network, notice the ripples in the pond and how they stop and start

  @Solla-topee 

The attached video was taken in playback mode while connected to my cellular network.

Notice how the dog stops and starts along with the ripples in the pond.

  @Solla-topee 

Your webpage will not allow me to upload the diagnose_log file from the C120, attached is the error the wepage gives.

It will also not allow more than one file to be attached, which is why I've responded to your post three times.

  @TP-Mark I have the same problem you have with the c120s. I have Arlo and I have Wyze both of which have no problem connecting when I'm away from my house. I guess the 120s are going to have to go back to Amazon unless they can fix this. I have Verizon FiOS fiber optic 300 up 300 down very fast internet and I have Google mesh system in my house. This is a problem with the c-120s not anything I'm doing