Last March (2017) I had my iPhone 5s battery replaced ofter 2.4 years of use (batt dying). In changing the battery they tore the tab, so instead they only allowed me to replaced the entire phone (same $79 charge). So in March 2017 I received a BRAND NEW iPhone 5s, however they only provided a 90 warranty. I used minimally, as a second work phone. A few days ago (late Dec 2017) I discovered the battery had expanded (short of exploded), bulging the middle of the iPhone almost 1/16 of an inch (almost 2mm). This was 9 months after I received this NEW phone. It was in a thin case that would not trap heat. This was used in normal temp areas. Use the Apple charger and cord. Apple Store says the only option I have to buy another new iPhone 5c for $79 (also no option to just replace the battery, they say it is considered destroyed). Something failed in this NEW phone that replaced an old unit. Were it new purchase it would be replaced for free. It is not a over year old phone with new battery, it is a COMPLETELY new phone with that failed early. (in comparison my parents 3GS still works great 7 years on and counting, and so are my old iPhone 4's passed to my relatives). Advice please.