Question by Comma Chameleon: What to check for when buying a used iPhone 4?
I have the iPhone 3gs and I want to upgrade to iPhone 4. I’m planning of buying a used one instead of the new one (huge price difference).
So my question is:
What do you check for when buying a used iPhone 4?
Camera, wifi, 3g networking, bluetooth etc..
A detailed answer will be very much appreciated.
Thank you!
Best answer:
Answer by hello.luiis
First of all, you want to make sure that you get it for the correct carrier (verizon or ATT)
Second, feel free to ask for the serial number and check to see if it’s still under warranty. You can check to see if it is at apple.com/support next make sure that the phone has not come in contact with any liquid. The phone should have two sensors, one in the headphone jack and one inside the dock connector. If you see pink or red on any of those two sensors, then the phone has come in contact with liquid and it will be considered out of warranty. If the phone’s sensors look good, check of course the physical condition and make sure there are no signs of physical damage. You wouldnt want a phone that was badly dropped or anything like that right? And lastly, the software yes, check that the camera works, take photos and video, ensure that you can use both cameras. Examine the multitouch features (swiping from page to page, zooming in on safari, etc) check that it does connect to wifi!! Bluetooth, sure, rarely iPhones have issues with Bluetooth, but thats if you actually plan on using bluetooth, ideally you want Bluetooth off so that you save on battery life. Test the gyro and accelerometer using maps and safari (when the screen flips in safari and when you have the compass feature in maps). Those should be the main things to look for. Don’t forget to clear his or her data after the sale. Enjoy your new iPhone 
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