@Lightning7 To assist you efficiently, I've forwarded your case to the TP-Link support engineers who will contact you with your registered email address later. Please pay attention to your email box...

@Lightning7 When internet stops working, are you able to log in the web management page without rebooting it to save system log file for analysis? The current beta firmware doesn't allow for...

@Nurfadila Please refer to this guide for troubleshooting: Troubleshooting guide of no internet access with TP-Link Wireless 4G LTE Router working as 3G/4G Router Mode If internet still doesn't work,...

@TP-MR6500V Hi, for the speed issue, please refer to this guide for troubleshooting: How to troubleshoot if I have low speed with TP-Link Wireless 4G LTE Router For hikvision dvr connectivity issue,...

@Jolanda-85B To change wireless settings for TP-Link router, please refer to this instruction: How to configure basic wireless settings of TP-Link 11AC router

@BOBZS What is the wired speed of your modem, wired speed of the router? For WiFi Speed, please test both 2.4G and 5G WiFi, also check the wireless link rate: How to check the associated/link speed...