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Yeah find that most of people starting to use homeplug, but i dont know if my house is able to used it since it 3-phase
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If they got the similar test or noise test like weikee said what reading should it be getting? so when they test i have some rough idea that the test is stable.. so that they cannot kelentong me..
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hope they got that kinda tester, cause they haven't do any check up yet..
Also i took some picture after installation of the keystone is that what they call it where the cat6 cable are installed on ..I let u guys judge the work to me its like cincai punya kerja

, here..
Living room

notice that i circled in red where the wire not sit properly in those slot...
Bedroom

compare to this i found on the internet very neat

and i read somewhere not to exposed those wire too much, then more noise disturbance happens which can degrade the performance...

also found that the keystone doesnt have dust cover..
seems like they dont have a proper tool to do a proper job...

Not all keystone come with the cover, with or without cover is ok. The installer should clean the edge of the exposed wires, he didn't do a nice finishing job, it won't affect the normal LAN speed 100Mhz (100Mbps / 1Gbps), but going higher which I doubt you will going to do it (10Gbps) may generate noise.
Don't expect the normal cable guys to have a noise tester.