iOS 12 Suica Performance Issues Update

iOS 12/watchOS 5 Suica performance continues to be a very mixed bag for many as Apple closes in on the iOS 12.1.3 update. There are no showstoppers but glitches are constant enough that there’s even an Reddit thread on the subject, a first. Suica performance glitches fall in 4 basic patterns:

  • Suica Express Card error flicker: occasional error flicker at transit gates with iPhone 7, iPhone 8, iPhone X (Rev. B) and Apple Watch 2~4. This is a completely different issue from the iPhone X NFC hardware defect. There is no workaround and will likely be fixed in an iOS update at some point…we hope.
  • Dead Suica Notifications/No Suica Balance Update: Suica Notifications stop working and Suica Balance fails to update at transit gates, store readers and Suica recharges. This affects iPhone 7, iPhone 8, iPhone X (Rev. B) and Apple Watch 2~4 but is easy to fix by putting Suica in Service Mode for a few seconds.
  • Slow or unresponsive Suica Recharge: this is probably more of a backend system issue between Apple Pay iCloud and Mobile Suica than iOS 12 but Apple Pay Suica recharge fails half of the time on the first attempt. This affects all devices and there is no work around except to try again. The Mobile Suica maintenance this month (January 2019) might help.
Suica Recharge works…sometimes
  • Dead Suica Express Card UI on A12 Bionic devices: another case of the hardware works but the software doesn’t that only affects iPhone XS and iPhone XR. Suica works flawlessly on readers but the entire Apple Pay Suica Express Card UI dies: no notifications, no balance update, no Apple Pay sound, no feedback whatsoever. Service Mode does not revive the Suica UI but a restart fixes it. Fortunately this issue seems rare. Unfortunately I have experienced it on 2 separate iPhone XS devices.

UPDATE
Good new: all Suica issues listed above are fixed in iOS 12.3 with great performance.

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