QUOTE(fkinmeng @ Apr 15 2018, 12:35 AM)
oops, my bad.
house - small double storey house.
devices - normally only 2 phones using, else 4 (2 phones 2 laptop)
router location - ground floor living room
how i measure - speedtest android app, wifi 2.4. during test, nobody is using anything.
place of measure - in front of router
fibre or vdsl - fibre
if it's ws880 - firmware 380.69
if it's asus rt-n12hp - firmware Version 3.0.0.4.380.2943 (the last version from 2016, before asus stopped support)
obviously i can just restart it every day but i rather not because lazy.

your scenario is a simple one, not complicated.
i am surprised u cant get full 30mbps wifi at a short distance.
i had rtn12hp_b1 for 4 years, 10, 30, 50mbps... full speed, stable, no frequent reboot.
from yr firmware, it is not a B1... but i dunno if yours is a significantly diff router.
what do u get with ethernet connection, say to your laptop?
if u get full n stable with ethernet but not with wifi, try changing channels, see if any diff.
if a second router gives same results, it may be a local area issue.
i suggest talk to yr neighbors and ask if they have same problem.