December 2025 phones you didn’t know were coming - #4 will surprise you!

December 2025 brings six exciting smartphone launches, including the OnePlus 15R, Vivo X300 series, Realme P4x 5G and more, offering powerful performance, advanced cameras and next-gen features for buyers.

Vivo X300 Series X300 amp X300 Pro — Image credit: Google

Vivo X300 Series (X300 & X300 Pro)

Vivo is set to release the Vivo X300 Series this month, and among the highly-anticipated smartphone launches of the month, the Vivo X300 Series’ launch on 2 December 2025, is the most awaited one. The Vivo X300 Series will sport MediaTek’s Dimensity 9500 chipset based on 3nm process for powerful flagship-level performance on both Vivo X300 and Vivo X300 Pro variants. For top-shelf mobile photography, the Vivo X300 Pro has a Zeiss-tuned triple rear camera system with a 50 MP Sony LYT-828 primary camera, 50 MP ultrawide lens, and 200 MP periscope telephoto camera for expansive and professional-grade imagery. The X300 Series is a package of premium-looking designs and powerful internals that is sure to appeal to fans of the brand and more casual buyers alike looking for a high-end device.

OnePlus 15R — Image credit: Google

OnePlus 15R

The OnePlus 15R is another 2025 device that is highly-anticipated in the market right now. OnePlus 15R is set to go on sale in India on 17 December 2025. The smartphone will be the first OnePlus smartphone in the world to be powered by the Qualcomm Snapdragon 8 Gen 5 chipset. The device will run on Android 16-based OxygenOS 16 on top of the flagship processor. This processor will be paired with high levels of dust and water resistance to keep things smooth while gaming, multitasking, and performing other demanding tasks for as long as you like. That means the OnePlus 15R might sport certification such as IP69 and IP69K, too. The phone will be available in Charcoal Black and Minty Green color.

Realme P4x 5G — Image credit: Google

Realme P4x 5G

The Realme P4x 5G will go on sale on 4 December 2025 via Flipkart in India. As the name suggests, the Realme P4x 5G is the newest member of the brand’s value-packed P-series of devices. The P4x 5G will come with a MediaTek Dimensity 7400 Ultra 5G processor and a 144 Hz refresh rate display that will ensure smooth and beautiful visuals. The device also packs a large “Titan” 7000 mAh battery with 45 W wired fast charging technology. The Realme P4x 5G will have all of the essential components for an excellent mid-range phone that will allow users to connect to the next-gen 5G mobile networks without breaking the bank.

OnePlus Ace 6T — Image credit: Google

OnePlus Ace 6T

The OnePlus Ace 6T is one of the most hyped upcoming smartphone launches this month for sure, and the Ace 6T will be available in China in December 2025, most likely followed by a rebranded version a few weeks later in some other markets as is the brand’s usual M.O. The Chinese OnePlus Ace 6T is expected to feature the Snapdragon 8 Gen 5 chipset with the brand’s Fluid display with thin bezels. It will have a square-shaped triple camera module on the back and a pill-shaped design. These features have been seen in leaks in the past. We don’t know about more specific internal specifications yet. It’s a smartphone that’s sure to impress tech lovers in China and other markets as well in the near future.

Oppo Reno 15C — Image credit: Google

Oppo Reno 15C

In addition, in December 2025, Oppo will most likely release the Oppo Reno 15C. This will feature a 6.59-inch screen with 1.5K resolution and a 120 Hz refresh rate. The Oppo Reno 15C will most likely be equipped with a Snapdragon 7 Gen 4 processor. The Reno 15C also has a unique triple camera on the back consisting of a 50 MP main camera, 8 MP ultrawide camera, and a 50 MP telephoto camera, so this phone will appeal to anyone looking for a great mid-range smartphone with a good camera.