Introdotto il 19 settembre 2014, questo iPhone con schermo da 4,7" è la versione più piccola dell'iPhone 6 Plus. Identificato dai numeri modello A1549, A1586, and A1589.
This problem is related to the touch ID. You will need to take the iPhone apart and disconnect the touch id connector. Restart phone and update normally. Reconnect once update has completed. Search youtube or google for connector location.
Error 53 is associated with the touch id on the home button. Has the home button been replaced?
da James Soulsby