Xperia devices 75Mbps wifi link but Samsung devices 150Mbps

CntrlAltDel45

Senior Member
May 7, 2015
117
18
0
Cape Town
I seem to be having an issue with the Xperia devices in the household. At the moment I have an XA1 Ultra, XA and an X all of which have link speeds to wifi at either 65Mbps, 72Mbps or 75Mbps however my Samsung devices i.e S4, S5, S6, S6 Edge all of have link speeds of 120-150Mbps.
I have a DLink router that supports N type wireless networks and I have it currently configured to 40MHz only in the 2.4GHz band instead of 20MHz as is evident from the Samsung devices working at the proper link speeds.
I use my android devices as FTP servers to do local transfers within the network so 65Mbps isn't too good. Is there any solution for this?

[Edit]
I forgot to mention, all the devices have 100% signal because they're all within the same room as the router.
 
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