QUOTE(faeyzul @ Dec 7 2020, 11:03 AM)
whats the difference between NFC & MST payment, some phone only support NFC payment. planning to downgrade my phone, cant afford S version more & more expensive

now using S8, broken lcd waiting to die

planning to change to A30s but stated only NFC payment.
You're not missing out on much without MST as most places accept Paywave nowadays.
MST is basically just a technology to imitate the magnetic strip of credit cards for legacy terminals that accept swiping cards only.
Haven't used it before but I think it's more tricky as it needs a more precise placement on the side of the machine and/or the cashier may just say no don't have this function and ask you to paywave instead.
Can refer to the links below for more info:
Samsung Support article on MSt -
https://www.samsung.com/global/galaxy/what-is/mst/GIF/Video of MST in use -
https://www.samsung.com/sg/samsungpay/