@freescoring i also having the same problem . i try to downgrade the firmware is working the speed is back to normal

@jrtham How do you do that? a reset?

@TP-Link yes i already downgrade firmware and now the internet speed is normal . and im cable direct to deco x20 is router mode. my normal speed is 295Mpbs after upgrade firmware only can get 95Mpbs. i was report last 2 week .now im waiting new firmware to update .

TP-Link wrote

@freescoring 

Good day,

Could you please help me check the following information and we would like to forward your case to the senior engineers:

1. Did the speed slow down since the firmware upgrade?

--if not, there is no need to downgrade the firmware；

2. Did the Deco work on the router mode, or AP mode?

3.What is the Speed test result on the App?

4. Did all the mobile devices have the same issue?

5. Please make sure the Qos is set up to standard and firewall, Parental control are disabled recently;

Then, please help us run a simple test:

--only leave the main Deco and connect the computer directly to the X20 via Ethernet cable, then run a speedtest and provide us the screen-shots;

 

Thanks a lot for your understanding and support.

Wish you a happy new year and Merry Christmas.

@TP-Link 

1. No idea, I have upgraded the firmware before use.

2. 1 router, 1 connected to modem in living room, second unit in kitchen

3. 900+ mbps up and down

4. yes. slight improvement to 90 down/150 up today

5. Ethernet cable: 800 down/400 up on living room unit. 500 down/150 up beside kitchen unit

@freescoring 

1. Did the speed slow down since the firmware upgrade?

--if not, there is no need to downgrade the firmware；yes after upgrade internet slow so i downgrade back 

2. Did the Deco work on the router mode, or AP mode? router mode

3.What is the Speed test result on the App? 290++

4. Did all the mobile devices have the same issue? yes

5. Please make sure the Qos is set up to standard and firewall, Parental control are disabled recently;

Then, please help us run a simple test:

--only leave the main Deco and connect the computer directly to the X20 via Ethernet cable, then run a speedtest and provide us the screen-shots;