WiFi connections on some phones are not stable, Follow below steps to do check.
1. Upgrade the latest firmware and APP
Click website www.innovv.com – K2 Support, then you can get the latest firmware here.
Find the latest firmware and then download to your computer.
Use an SD card and then put this firmware on it, please make sure there is only one bin file with K2 on the SD card and there is no suffix (1) or (2) after the name of the file.
Put the SD card into the DVR slot and power it up, and the red light above the DVR starts flashing quickly. It will return to normal flicker status after about 10 seconds, indicating that the update was successful.
The video is for your reference.
https://www.dropbox.com/s/355vvchsjh6g4hr/INNOVV%20K2%20Firmware%20update%20%26%20LED%20flashes.MP4?dl=0
Then you can check the latest version APP on phone store, uninstall the old version and update the latest version.
2. Set phone to airplane mode, and enable WiFi connection only, reconnect WiFi and access setting again
3.Confirm whether the mobile phone location function is turned on or not, and make sure it is turned on during APP use
4. Refer the below photo to forget INNOVV K2 WiFi network, and re-input password and reconnect
5. Reset K2 system by reset button
The reset button is located next to the SD card slot, and when pressed, the DVR is turned off. When the power needs to be turned on again, the DVR reverts to its factory Settings.