Answer to: iPhone says "This accessory may not be supported"If you get an error message on the charger, this usually means that the iPhone does not see the supply voltage and charging current it needs. So there is something wrong in the chain from; wall charger - lightning cable - iPhone connector Procedure to follow: 1) First check metal contacts on all . Should be shiny gold. If not shiny: clean with soft plastic pin or wooden tooth pick (no metal pins!) 2) Non-Apple cables may have too thin metal wires, which restricts the current flow. Solution: Buy an Apple certified one. 3) Non-Apple chargers may have too low supply voltage, which restricts charging power. Solution: Buy an Apple certified one. 4) Non-Apple chargers may have too low supply current, which restricts charging power. Solution: Buy an Apple certified one. 5) Cable may have broken metal wires inside (e.g. due to rough treatment) Solution: Buy a new Apple certified one. - This should solve the charging problem.