According to 9to5Mac, Apple Stores will begin offering replacement services for various iPhone 5s and iPhone 5c parts and you need not to replace full unit, despite that the cost of every part is a bit high like screen replacement will cost $149 per device.
Costumers whose device will break in the middle of two-year contract, can have a new device after paying hundred of dollars. And if the device is on AppleCare warranty, costumer can have replacement of parts free of cost, however for others each part will cost as per the rate.
The report also tipped the ability for store employees to replace the battery ($79), volume buttons, vibrating motor, rear camera, and speaker system on both the iPhone 5s and 5c, the latter of which makes for an easy Home button swap ($29), as well. iPhone 5s users, however, are out of luck if their Touch ID-based key stops working.