iPhone 4S drove many of us to cancel contracts

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Why and How I Upgrade My iPhone Every Year

Buy iPhone 4 Without Contract: $599 (AT&T) and $699 (Verizon)

Will Apple stop supporting iOS on iPhones older than five years old? - Quora

Apple iPhone 4s 16Gb A1387 Black - Telus - Working Perfectly - MD234C/A 885909525706

Apple iPhone 15 Pro Features: USB-C Port, New Design, Thinner Bezels - Bloomberg

Is the iPhone 4S obsolete? - Quora

New iPhones and iOS 7 team up for winning combo

iPhone 5 Reaches Same Level of Online Sales in First 3 Days that - Comscore, Inc.

5 things to know about the next iPhone

Apple Reaches Settlement to Pay $15 to Some iPhone 4S Owners Who Experienced Buggy Performance After iOS 9 Update - MacRumors

iPhone 4S drove many of us to cancel contracts

Apple iPhone 4: Verdict - iPhone 4 review - Page 15

Apple unveils lighter, slimmer iPhone 5