WIKI - NFC phone performance

My S10 plus with a commuter OtterBox case will read my flexnt but not my spark2. If I take the case off it has a 100% read rate.

My wife’s A8 won’t read anything with the same OtterBox case, not even the flexnt. Without the case it has a little trouble on the flexnt but gets there eventually, haven’t tried the spark with it yet.