Hello,

I am currently on one Wifi router (Sercomm C1AS) from my internet providor.
I am considering installing a mesh internet in the house, 4 bedroom.
4 wifi points should be sufficient.
My issue is to check what method is better to migrate to mesh wifi; I am considering deco M4; I have 750 mbps connection.

Is M4 sufficient? in 5 ghz it should provide my 750mbps , correct?

Connection wise, Is it recommended to keep my current service providor router (Sercomm C1AS) providing wifi, and add the decos in AP? using below diagram:
[ISP Router] ----------- [ switch LGS308 ] ---------------[ Main Deco M4]
                                                              |
                                                              |--------------[ 2nd Deco ]
                                                              |
                                                              |--------------[ 3rd Deco ]
All “ -------- “ are wired cables
Will the ISP Router along with the Deco's all provide Wifi? they share the same ssid? how to check for backhaul compatability for router and switch?
 

Alternatively :
I disable the wifi on my ISP router and purchase an additional M4 unit, wire them as per below in router mode.

[ISP Router] ----------- [ Main Deco M4 ] --------------- [ switch LGS308 ]
Wifi disabled                                                               |
                                                                                   |--------------[ 2nd Deco ]
                                                                                   |
                                                                                   |--------------[ 3rd Deco ]
                                                                                   |
                                                                                   |--------------[ 4th Deco ]

In the second alternative scenario, my network management ( parental controls, scheduling, etc...) would be done via the ISP router or Main Deco M4?

In both scenarios do I need a new router or the Linksys LGS 308 would do the job?

Thanks for your support.