Congested yan yung routing lines paps. Doesn't matter if mabilis parin speedtest mo, if congested yung routing ng pldt/smart lag parin yan. Not sure when yan ifix ni smart, for the meantime antay ka lng muna until 11pm or switch ka sa globe baka mababa yung ping or fibr if kaya since mas stable siya for some reason.
TLDR: Merong packet prioritization issues ang pldt ngayon which causes routing congestion. Smart, sun at tnt backbone nila is pldt so yeah nadamay rin.