Iphone 4s left side of keyboard not working after ios 7.1.2 update

even though it is hard to believe Apple sold a new 4s but won't rule it out. Good luck in your endeavor with Apple.

IIRC, the 4s is the "free with contract" phone since the 5s/5c came out. The original 5 was discontinued, since the 5c has all the same internal parts.

If he had to pay for it, then likely it was bought off contract, but that wouldn't effect the warranty status.

Double ROT13 encrypted for your protection

source: forums.imore.com