Chosen Solution
Can using a iSclack stop Apple Pay from working?
These devices are simply suction cups which stick on the back of your phone to give you a handle. As they are made with rubber which is radio transparent it shouldn’t interfere with the RFID signal. More likely the device when extended can prevent you from holding the phone close enough to the RFID pad.
It won’t, but try to put it in the middle of the phone .
