UOB has introduced a slight change in the T&Cs for UOB Preferred Platinum Visa users to continue to earn 4 mpd for contactless payments.
Until now, any form of contactless payment using either the physical card or your mobile wallet, will earn you 4 mpd when you use your UOB PPV card at any merchant (except UOB SMART$ merchants).
However, from 22 May 2020, UOB PPV users must ensure that all contactless payments are made only via their mobile wallets (e.g. Apple Pay, Samsung Pay, Google Pay etc.) in order to continue to earn 4 mpd for such transactions.
While the main T&Cs have yet to reflect these changes, the UOB website has already made these changes explicit:
You can still continue to use your UOB PPV card to earn 4 mpd via contactless payments such as PayWave for now, but do remember to add your card to your mobile wallet before 22 May 2020 in order for you to continue to earn 4 mpd for “mobile contactless” transactions.