i found an iPhone 4s with iOS 6.1.3
Hi everybody i just found an iPhone 4s 16gb on a cheap contract at the weekend. After much debating i decided to get this when i switched it on it has iOS 6.1.3 on it should i upgrade it to iOS 8. To me it just seems faster to leave it on that as i already have iPhone 6 plus on iOS 9. Is this iPhone 4s still covered by apple warranty thanks if anybody can help.