In the early days of 2026, a remarkable resurgence in popularity occurred for the iPhone 4, a device that had already been on the market for 15 years. This unexpected surge was largely propelled by TikTok, with demand for the classic phone skyrocketing by nearly 1000%. For content creators, the iPhone 4 has become a chic emblem of nostalgia, while everyday users are drawn to the distinctive grainy texture and atmospheric quality of photos captured by its 5 - megapixel camera. Nevertheless, experts at Compare and Recycle have issued a word of caution. They point out that the most recent iOS version compatible with the iPhone 4 is iOS 7.1.2, which dates back to 2014. This outdated software poses significant digital security threats, leaving user data susceptible to breaches and leaks. To address these concerns, experts advise a series of precautions. These include manually transferring photos instead of relying on cloud services, steering clear of logging into iCloud or personal Apple IDs, avoiding the installation of sensitive apps, and keeping the device disconnected from the internet as much as feasible.