i'm using 1 to test their 5G.
boleh la.

som place fake 5G, som place real 5G.
when got real 5G, it's really blazing fast.

speedtest local server is 5G speed.
but international, get 4G speed.

most of the 5G covered place ok la.
like city centers.

just get the free sim to try, ntgh to lose.

test for 1 month then cancel it.
if u wish to continue using, will hav to pay.

i think u hav to contact yes to cancel if dun wan to use already.

i dint take the free sim.
i bought Yes Prepaid FT5G Unlimited for testing.
this 1 is prepaid, so if u dont renew, will just auto cancel after certain period of dormant.
RM25 a month if renew.

email to them at yescare, or use the myyes app support chat.

u can try their direct support line 018-3330000, not sure still active o not.