Incorrect iPhone date and time settings might potentially pose problems, particularly when working with real-time transactions. Verify and confirm it is properly configured to rule this out as a possible reason. Here's how to go to and adjust your iPhone X's date and time settings:

1. Select Settings->GENERAL>Date & Time from the drop-down menu.
2. Toggle the 24-Hour time switch to ON.
3. Toggle on or off the Set Automatically switch. Tap Time Zone if Set Automatically is turned off.
4. Then press to enter your location, whether it's your city, state, or country.
5. Set the date and time manually by tapping the Date & Time box.