QUOTE(StuartLee2015 @ Sep 13 2018, 01:46 AM)
tested what you mentioned on 5ghz... nothing, only can connect if i sit in front of router and need really really close.
My phone is dual-sim, I use local Umobile sim, and i don't think it can affect that since i use wifi.... ?
Newer version of Android configure regulatory domain with the combination of SIM card country code as well as beacon 802.11d CC.
Just ask you remove to be sure in case you have 2 SIM card with conflicting regulatory domain.
Anyway, I tested it myself, even at the lowest 25mW still won't get such low speed.
You also said you tested with your sibling's tablet and same case.
So I really kind of want to say faulty hardware.