Unreliable internet using TP-Link AC750 Wireless Dual Band 4G LTE Router
Hoping someone can help me with my problem.
For my home internet I am using a TP-Link AC750 Wireless Dual Band 4G LTE Router Archer MR200, with an Optus 4G sim card inserted. I have this hooked up to a switch which allows me to connect to the router via network cables all around the house. In addition to this I have extended the range of the wifi via a wifi extender because some corners of my house cannot receive a signal without the extender.
I have maximum 15 devices connected to the home network but normally only up to about 5 active devices (downloading or uploading data) at any one time. Of the 15 devices, 4 are a wired connection with normally only 1 active at a time. The remaining are wireless connections.
The problem I am having is that the connection is very unreliable, even for the devices with the wired connections. Sometimes the connection is working fine, I can stream Netflix with no issues and web pages download quickly, etc. However, at other times it is either very slow (can't stream Netflix and web pages are very slow to load) or drops out completely, this is happening on a regular basis (roughly every 2-4 days). Rebooting the modem helps sometimes, other times the internet is still slow after a reboot
I also have an Optus 4G mobile phone. When I am experiencing these issues, the internet on my phone still works fine which leads me to believe it is not an issue with Optus 4G in my area.
Does anyone know what could be causing this problem and how I could fix it? Can I play around with the settings in the router to improve the reliability?