Mobile phones are portable devices that enable communication over radio waves without requiring a landline, with the first handheld model being the Motorola DynaTac 8000x launched in 1973. They have evolved significantly, now offering features such as multimedia services, internet access, and various productivity applications, while also posing health risks and issues like addiction and cyberbullying. Additionally, concerns regarding privacy, data breaches, and malware threats have emerged with the increased reliance on mobile technology.