I have 300mbps internet and my 3 month old tp-link ac1900 was good until I noticed that 2.4 under 34mbps and 5g too after the reset was about 140 Mbit/s. Then, after installing tenda, I had to restart my cable modem and wifi, and after some changes in the software, my 2.4 speed was 64 Mbps (expected at least 150 Mbps), but I think that's enough , now 5G was really good. got 340Mbps! I can't say it's the best Wi-Fi out there, but it does the job.
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