Deco X20 V1 dont run stable after firmware update

Deco X20 V1 dont run stable after firmware update

Deco X20 V1 dont run stable after firmware update
Deco X20 V1 dont run stable after firmware update
2026-01-05 07:55:22
Model: Deco X20  
Hardware Version: V1
Firmware Version: 1.6.1

I have some Deco X20 V1 with 2 version 

- Deco_X20_V1.2_1.6.1_Build_20250910_Rel.43292

- Deco X20V1_en_1.6.1 Build 20250831 Rel. 77853

 

After i upgrade my Deco X20 v1 to lastest version 1.6.1, it can run full speed my bandwidth

Now it only can run 200-280Mbps insteed my network 800Mbps

I tried with a Deco X20 V3.2 EU and it can run with 500-600Mbps

Please check and help me

Thanks

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#1
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6 Reply
Re:Deco X20 V1 dont run stable after firmware update
2026-01-06 06:40:08

  @ThanhHa 

Hi, welcome to the comunity.

May I know how long you have had the Deco X20_V1.0/V1.2?

 

Did you add all three Deco X20s(V1.0+V1.2+V3.2) into the same Mesh network? Or setting a separate Mesh Network using each of them?

 

Have you tried to reset the Deco X20 V1/V1.2 once (by holding the reset pinhole for 1s), then set it up again to see whether it made any difference?

Thank you very much.

Best regards.

 

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#2
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Re:Deco X20 V1 dont run stable after firmware update
2026-01-06 07:26:16

  @David-TP 

Hi

I tried to setup 1 Deco 1 network and speedtest

Only 2 X20 Japanese version run with low bandwidth, only X20 EU run better

I used 2 X20 v1 JP  for 1 years and X20 EU i bought from my friend but it is older then X20 JP

Thanks

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#3
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Re:Deco X20 V1 dont run stable after firmware update
2026-01-06 07:26:41

  @David-TP 

I reset and setup many times and it only have 1 result 

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#4
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Re:Deco X20 V1 dont run stable after firmware update
Wednesday

  @ThanhHa I have the same problem. It's clearly a firmware bug. Are you going to release a fix soon ?

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#5
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Re:Deco X20 V1 dont run stable after firmware update
Friday

  @GeorgeDad I created this ticket for TPlink helpdesk but maybe noone in TPLink care about their product

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#6
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Re:Deco X20 V1 dont run stable after firmware update
Friday

  @ThanhHa it is clear for me they don't. it has been months already. i already ordered a different solution , from a different seller. never going back.

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#7
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