iOS 7 on iPhone 4 Is “Unusable,” Customers Say [Updated]
question] Recently got my hands on an iPhone 4 running iOS 7.1.2. Should I jailbreak it? Btw it's a 32gb white, I also need to replace the battery. : r/LegacyJailbreak
iOS 4 - Wikipedia
New lease on life or death sentence? iOS 7 on the iPhone 4 | Ars Technica