STEP 1. First you have to locate the serial number of your iOS device.
STEP 2. Now you have to go to Apple’s Service & Support Coverage check.
STEP 3. Now you have to enter the serial number of your iOS device and then click on “Continue” button.
Now you will be able to see a screen which will show you the Apple Care warranty status of your iOS device, including eligibility for repair coverage, remaining time with phone support, and eligibility for extending the warranty as you can see from the image posted above.
That’s it. In this way you can check the Apple Warranty status of your iPhone, iPod touch, iPad. You should note that if your AppleCare warranty is about to expire soon then you have to buy an extended AppleCare coverage plan. For the extended warranty you don’t need to pay full price. Simply buy the AppleCare Warranties through Amazon in order to get discount. [Via]