@TP-Link_Deco  thank you for your quick response!

Ok 1 I confirm that both if I connect my laptop with wifi or with ethernet cable directly to the router MR6400 everything work fine.

the IPaddress of the router is 192.168.0.1 the dashboard indicate:

the IP config /all indicate

C:\Users\LeHul>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : LAPTOP-0H4S1BAR
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Local Area Connection* 1:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #3
   Physical Address. . . . . . . . . : 3C-6A-A7-82-41-00
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Local Area Connection* 4:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #4
   Physical Address. . . . . . . . . : 3E-6A-A7-82-41-FF
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Ethernet 2:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Killer E2500 Gigabit Ethernet Controller #2
   Physical Address. . . . . . . . . : D8-C4-97-AD-9A-BF
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::3972:dd:f9d5:b6fd%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.0.102(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : October 26, 2020 8:25:15 PM
   Lease Expires . . . . . . . . . . : October 26, 2020 10:33:28 PM
   Default Gateway . . . . . . . . . : 192.168.0.1
   DHCP Server . . . . . . . . . . . : 192.168.0.1
   DHCPv6 IAID . . . . . . . . . . . : 232309911
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-23-58-E0-5A-D8-C4-97-AD-9A-BF
   DNS Servers . . . . . . . . . . . : 9.9.9.9
                                       149.112.112.112
   NetBIOS over Tcpip. . . . . . . . : Enabled

Wireless LAN adapter Wi-Fi 2:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Killer(R) Wireless-AC 1550i Wireless Network Adapter (9560NGW) 160MHz #2
   Physical Address. . . . . . . . . : 3C-6A-A7-82-41-FF
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter Bluetooth Network Connection 2:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network) #2
   Physical Address. . . . . . . . . : 3C-6A-A7-82-42-03
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

C:\Users\LeHul>

I follow step 2 (same as before) tried with different port on the router... try with my Iphone 7Plus and tried also with my Android OPPO F7  everything ok until connect to the internet the light on the M5 become Red Solid! I reboot both the M5 and the Router still the same solid Red! 

I tried on my PLDT DSL and it's working fine Green light.

I check all in step 3 didn't find nothing that was working with my MR6400

So I thinks the configuration of the MR6400 is a problem! 

Maybe you can find some setting wrong !

Thank's again for your help!

It is possible that both the M5 Mesh and router MR6400 IP address by default 192.168.0.1? How can I change the default IP address on the M5? or should I change on the MR6400 4G modem/Router? what IP address should I put as default? maybe that why when I click on connect become a solid red light? the IP address pldt router by default is 192.168.1.1. and when I try the M5 on that Network it's working fine!

@TP-Link_Deco  Thank you for the information!  ok the TL-MR6400 IP address it's 192.168.0.1 and the M5 Mesh it's 192.168.68.1

what should be the most compatible IP address that can work together? Can you tell me what should be IP-Address for the TL-MR6400 and what should be the IP-Address for the M5 Mesh?

With the PLDT 192.168.1.1 the Mesh M5 work fine

or maybe it's another setting inside the RL-MR6400 wrong?

I hope I can make it work!

Regards

Cebuman

@TP-Link_Deco 

Hi I made a test it's definitely an IPConfig Address problem:

Like I wrote previously on my PLDT network the router has 192.168.1.1 and the M5 Mesh install perfectly if I try on that network.

But my router TP-link TLMR6400 on my Globe Network the IP Address was 192.168.0.1 and the M5 Mesh couldn't connect on the internet.

So I disconnect my PLDT Network and I reset the TL-MR6400 to factory default then the IP Address was also 192.168.1.1 and the Mesh M5 installed perfectly the 3 unit M5 Mesh 

My laptop has Dual Connection one Ethernet and one WiFi   Example Ethernet for PLDT and WiFi for Globe or Ethernet on Globe and PLDT on WiFi...

I need back my PLDT Network with the IP address 192.168.1.1 ( all equipment in the network are program to work on that network and work well)  but it will be a conflict address of the TL-MR6400 Globe new network. 

So what IP Address should I choose for the TL-MR6400?

I didn't change any address on the M5 Mesh still 192.168.68.1

Thank's again for your help!

Cebuman