Thank you in advance.
Salamat po may sumagot din hahahaNope, di yan mawawala. I'm guessing you're registered to Unli Data.
Anyway, yes, di yan mawawala if nag-upgrade sim ka to 4G.
What Smart's Upgrade Sim does (in theory) is that it only changes the "ICCID" number linked to your Prepaid Account Number.
Wag ko na further explain kasi out of topic naman hahahaha.
salamat poHindi ganun parin...
yun sim ko na tnt 3g na upgrade ko to 4g pag tingin ko giga app nandun parin yun promo...ewan kulang sa iba