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Following more frequent authentication on Android phones, Google Wallet for Wear OS might be requiring PIN code entry before allowing tap-to-pay transactions. We haven’t been able to replicate this ...

If you have an Apple or an Android phone—and you probably do—you have the option of locking your phone using a PIN code. With most of these phones, you can choose a four-digit PIN or a six-digit PIN.

There are many opportunities to use 'four-digit PIN numbers' in our daily lives, such as credit card PIN numbers, smartphone passcodes, and PC unlock codes. In all cases, we should use four-digit ...