6 Upcoming smartphone launches in December 2025: OnePlus 15R, Vivo X300 series and more

December 2025 will see several new smartphones arrive in India, including the OnePlus 15R, Vivo X300 series, Realme P4x 5G, and more, offering new chipsets, improved cameras, and upgraded displays across mid range and premium segments. Here's everything you need to know on the upcoming smartphones.