Re: How to retrofit bonk-pay to your existing Smartphone
That can lead to scratching the phone. A better option may be to grab a sticker/coffecup/keyring/wristband/ring with the chip in from your provider of choice e.g. https://www.optus.com.au/shop/mobile/phones/wearables/optus-pay, https://www.westpac.com.au/personal-banking/mobile-wallets/paywear/, or www.inamo.com. In Australia at least. Not sure about other countries.