Upcoming Smartphones In December 2025: If you are also waiting for a flagship 5G smartphone to launch in December 2025, then there are a few brands who are launching their flagship 5G smartphones in December 2025. These smartphones include OPPO Reno 15C, OnePlus Ace 6T, Realme P4X, OnePlus 15R, and Vivo X300 series. Here is everything you need to know about these smartphones mentioned below.
1. Vivo X300 Series
Vivo X300 series includes the Vivo X300 Pro and Vivo X300 smartphones. These smartphones are set to launch in India on December 2 at 12:00 p.m. IST. These smartphones will be powered by a 3nm MediaTek Dimensity 9500 SoC processor paired with a Pro Imaging V S1 chip and the V3 Plus imaging chip. The smartphones will run on Android 16-based OriginOS 6.
In Vivo X300 Pro smartphone, you will get a Zeiss-tuned triple camera setup, which will include a 50 MP main Sony LYT 828 sensor + 50 MP ultra-wide camera + 200 MP HPB APO telephoto camera.
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2. OnePlus Ace 6T
OnePlus Ace 6T smartphone is also expected to launch in December in China. However, the Indian launch date of this smartphone is still unconfirmed. Some reports mention that it is said to be a rebranded version of the OnePlus 15R smartphone, which is also going to launch in India in December 2025. The smartphone will be powered by a Snapdragon 8 Gen 5 SoC processor, and it will get a flat display with relatively narrow bezels, and the phone will be available in Black, Green, and Violet colours.
3. OPPO Reno 15C
OPPO Reno 15C smartphone is also expected to launch in December. The smartphone is expected to feature a 6.59-inch display with 1.5K resolution and a high refresh rate of up to 120 Hz. The smartphone could be powered by Qualcomm’s Snapdragon 7 Gen 4 chipset, and it will carry a 50 MP Sony LYT 600 main camera + 8 MP ultra-wide camera + 50 MP telephoto camera.
4. Realme P4X
Realme P4X smartphone is set to launch in India on December 4 at 12:00 p.m. IST. The smartphone is confirmed to go on sale in the country via Flipkart. It will be powered by the powerful MediaTek Dimensity 7400 Ultra 5G chipset, and you will get a 144 Hz smooth refresh rate, a massive 7000 mAh battery pack which will provide you two days of battery backup easily, and it will support 45W fast charging.
5. OnePlus 15R
OnePlus 15R smartphone is scheduled to launch in India on December 17, 2025. The smartphone is claimed to be the first smartphone powered by the Qualcomm Snapdragon 8 Gen 5 chipset, and it will also get IP66, IP68, IP69, and IP69K ratings for comprehensive dust and water resistance. The phone is likely to run on Android 16-based OxygenOS 16 in India. You will be able to purchase this smartphone in Charcoal Black and Mint Green colour options.