Hi
If the dent is due to accidental damage:
- Accidental damage is not covered under the One Year Limited Warranty. Your iPhone may be eligible for chargeable, out-of-warranty service.
Out-of-warranty service prices in the US, for example, are available here:
- If you purchased AppleCare+, up to two instances of accidental damage are covered, in return for a service fee / excess on each occasion.
Whether the dent is due to accidental damage or a manufacturing defect, contact Apple Support (mail-in service may be available), make a Genius Bar reservation or visit an Apple Authorised Service Provider to arrange for your iPhone to be inspected and to establish your available service options, timescale and, if appropriate, cost:
- Contact - Official Apple Support
- https://twitter.com/applesupport
- http://www.apple.com/retail/geniusbar/
- https://locate.apple.com