The Nokia 3310 was released in 2000 and became one of the best-selling mobile phones ever, known for its durability, long battery life and simple design. Its short startup jingle played every time the handset was switched on, so millions of users heard it daily. As smartphones replaced older phones, the sound survived online in nostalgia videos, memes and retro tech compilations, where it instantly signals the early 2000s and a simpler era of mobile phones.