@pjaguilar It is glad to know that you figure it out by replacing the modem. As for the upload speed, QoS feature won't affect its performance; and if you do not enable QoS and set up QoS as...

@dansharpy Hi, I have replied to you on this thread and we will follow this up. https://community.tp-link.com/en/home/forum/topic/196328?replyId=412028

@Boxerkailas You can log into the web UI of TL-WR840N first. Then you can go to wireless settings/wireless security page to change the wifi name and password. If you want to change the login username...

@flo1611 Hi Flo, we have noted that and will focus on similar feedback and forward it to our product department. Even though it won't be a short time, you can keep an eye on official website for the...

@Jooby You can try what @CHIBOMAN said to change the encryption type. Besides, you can change other wireless settings to give it a go. Including wireless channel, channel width. And please ensure...

@archerC2 Wha is the model number of your TP-Link device? You can find it on the back label of the actual device. What is the current hardware and firmware version as well? You can find them on the...