Hello@thecentralnews ,

Welcome to our community.

The TL-WR850N is a custom device designed specifically for local service providers. Its software is tailored to meet the unique needs of these providers, ensuring it meets their specific requirements.

Due to the specifics of your device's firmware, our ability to provide troubleshooting may be limited. We can offer some troubleshooting tips that may help resolve your issue. Please consider the following:

1. Disable QoS, please access http://tplinkwifi.net and go to Advanced >> QoS to disable it.                     
2. Disable Parental Control, please go to Advanced >> Parental Control to disable it.
3. If wireless speed is slower than expected, please go to Advanced >> Wireless Settings to change the 5GHz Wi-Fi channel, you may try different channels to find the best one for your environment.

If it still doesn't work, we recommend you contact the technical support of the service provider who provided the device, as they are best suited to provide the necessary assistance for your device.

Note: For personal information, such as your email address and phone number, I would suggest you re-edit your post and delete these two sets of information.