How improve my WIFI connection?

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I have 80 Mb/s download and 20 upload MB/s when i'm connected to cable(laptop) and 0.8 Mb/s and 15 Mb/s upload when i'm on WIFI (TP LINK WIFI router that should work at 100 Mb/s. I wonder why i have so low download speed yet the upload not changed that much. How improve WIFI speed?

What type of device are you using to test the download speed?

Laptop, but i already fix this i asked i other forum, they told my to switch router wifi channel, it was channel: auto i switched to channel 6, now i get 20 Mbps, it's fine with me.

Try putting your router in a central area in the house so it can reach all areas of the house. Also, keep it away from walls.

Get some kind of wifi analyzer software (don't know about ones for Windows, I use Wifi Analyzer on my android phone), and check which channel your router is using, along with the channels your neighbours are on. If you're overlapping other networks nearby, it can cause slow wifi.

If your home has particularly thick walls (or they're plasterboard with a metal foil backing) wifi signals can degrade significantly. You can use additional access points to cover a larger area, perhaps using homeplug/powerline networking to save running wired network cables through the house.

I use the same "Wifi Analyzer" that polarity does. It can be a real eye-opener.

One trick you can do is set up a 'repeater', it puts up another transmitter with the same SSID and password. Might cut into bandwidth though.

Another trick is to get a power line pair, I have one from TP-Link. One unit plugs into the wall, a cable goes over to the wired connection on your router. You pair it with a bigger unit that has a transmitter. Then that unit is set up with the same SSID and password but different channel.

There are devises you can buy so that you can run Ethernet over the power line in your house. It's basically two plastic cubes you plug into different power outlets; they both have an Ethernet port on them. You connect an active port in your house to a cube plugged into an outlet via ethernet cord, then plug the second cube to an outlet in an area in the house you want to use the internet in; you run an ethernet cable from the second cube to your computer. My desktop is in a room 50 ft from a port in my house, this thing totally fixed the problem and the difference in bandwidth (compared straight to router ethernet) isn't noticeable, and you will occasionally lose connectivity (once) in back to back weeks if not less frequently. You can go to RadioShack and they'll have em.

You're just going to get faster internet if you stick to wired, plain and simple. If you need to walk around with the wireless devise or if it's a tablet, my first action would be to enable WPA2 and set a password: there are a finite number of packets coming from your transmitter and you will receive less (per x interval of time) of time if you're "sharing the goodies" with your neighbors.

You want to download a free tool for your Windows PC called "InSSIDer". You can see all of the wireless networks in your area and their signal strengh graphed over the past several minutes, what channel they're on, etc. The program scans through which channels all the other networks in your area are using and recommends a channel where there will be the least interference. I live in a big apartment building where everyone has wifi and InSSIDer has been indispensable for me.

Obviously, you need to be on a wireless enabled device to use the program.

buy a plug in repeater and place it somewhere in your home where the wifi is still strong to get rid of deadspots.

I use a repeater. It's a pain sometimes, but it works. I also just learned that you can use tin foil, kind of like the antenna tv principle. Just make a shield behind it. I can't vouch for this technique, but it's cheap enough to give it a shot.