If you have a phone case, it is flat and does not contain any metal, centrally located magnets, card holders, pop sockets or kickstands.Ensure your phone is aligned as centrally as possible. Check if your phone is Qi wirelessly charging enabled. Check your sticker position through recalibration. Check your table thickness is within the stated performance range. InvisQi will not work if the phone is placed directly on the charger. InvisQi operates at a minimum distance of 0.25".