Why does my phone keep disconnecting from the Wi-Fi?

[Android Central Question]

I have a Coolpad Pro running Android 7.0, and a Spectrum router. Everything else in the house has no problem connecting, and my phone used to connect to the Wi-Fi, but now it'll only connect for a few seconds. And if it stays connected for more than a few seconds, it disconnects as soon as I open anything that uses the internet. I've tried every combination of turning Cricket Wi-Fi Manager, Auto Connect Type, an Network Notification on and off. But nothing seems to work at all.

 

[Android Central Question]

I have a Coolpad Pro running Android 7.0, and a Spectrum router. Everything else in the house has no problem connecting, and my phone used to connect to the Wi-Fi, but now it'll only connect for a few seconds. And if it stays connected for more than a few seconds, it disconnects as soon as I open anything that uses the internet. I've tried every combination of turning Cricket Wi-Fi Manager, Auto Connect Type, an Network Notification on and off. But nothing seems to work at all.