Be careful of the contactless limit of each card. After using ABT on my POSB passion (master) from the beginning of the trial, the payment for contactless fail, suddnely error upon tap on gantry, GTM reader and all payment via physical card when using contactless payment mode.
Called POSB to re-issue card, register new card to ABT and use for months and again the contactless limit reach and card fail again.
Long story short: there is a limit count to each card contactless payment, once it reach it will fail for all physical contactless payment mode aka paywave, tap on public transport , also cannot convert back to CEPAS (if you have normal ezlink value inside then too bad as GTM or control station staffs also cannot read the card.
For normal physical withdraw, swipe payment, EMV payment still work and your mobile payment on phones with Apple pay, Google pay and samusng pay and even previously enrolled mobile ABT will still work as it's different virtual card number.
Is ABT causing the cards to fail after x number of taps or all cards have limited number of taps before they conk out? So rubbish, I'm using BOC, if fail they sure take donkey years to reissue my card