Apple products, including iPhones, are generally covered by a limited warranty of one year from the date of purchase. This guarantee covers defects in materials and workmanship under normal use. To check whether your iPhone is still under warranty, you can go to your device settings under "General" then "AppleCare and Warranty" or visit checkcoverage.apple.com to enter the serial number of your device.
If you have subscribed to AppleCare+, this may offer additional cover for accidental damage and battery replacement if the battery retains less than 80% of its original capacity.
