Compare / Oppo F31 vs Oppo K15x
Oppo F31 vs Oppo K15x
A side-by-side comparison of the Oppo F31 and the Oppo K15x, covering display, chipset, memory, camera, battery and build.
Overview
Display
Oppo F31
6.57inch
AMOLED · 120 Hz
1080 × 2372 · 397 PPI
Oppo K15x
6.75inch
IPS LCD · 120 Hz
720 × 1570 · 256 PPI
Chip
Oppo F31
Mediatek Dimensity 6300 (6 nm)
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
Mali-G57 MC2 · Android 15
Oppo K15x
Mediatek Dimensity 6300 (6 nm)
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
Mali-G57 MC2 · Android 16
Memory
Oppo F31
8GB RAM
128 GB · 256 GB storage
microSDXC
Oppo K15x
6GB RAM
128 GB · 256 GB storage
microSDXC
Camera
Oppo F31
50MP
16 MP selfie
1080p@30/60/120fps video
Oppo K15x
13MP
5 MP selfie
1080p@30/60fps video
Battery
Oppo F31
7,000mAh
80 W wired
Oppo K15x
6,500mAh
45 W wired
Build
Oppo F31
185g
158.2 × 75 × 8 mm
IP68
Oppo K15x
212g
166.6 × 78.5 × 8.6 mm
IP64
Connectivity
Oppo F31
5GWi-Fi 5Bluetooth 5.4Nano-SIM + Nano-SIMUSB Type-C 2.0
Oppo K15x
5GWi-Fi 5Bluetooth 5.4NFCNano-SIM + Nano-SIMUSB Type-C 2.0
Specifications
Oppo F31
- Technology
- GSM / HSPA / LTE / 5G
- 2G bands
- GSM 850 / 900 / 1800 / 1900
- 3G bands
- HSDPA 900 / 2100
- 4G bands
- 1, 3, 5, 8, 19, 28, 38, 40, 41, 42, 48
- 5G bands
- 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
- Speed
- HSPA, LTE, 5G
Oppo K15x
- Technology
- GSM / HSPA / LTE / 5G
- 2G bands
- GSM 850 / 900 / 1800 / 1900
- 3G bands
- HSDPA 850 / 900 / 2100
- 4G bands
- 1, 3, 5, 8, 28, 34, 38, 39, 40, 41
- 5G bands
- 1, 3, 5, 8, 28, 41, 48, 77, 78 SA/NSA
- Speed
- HSPA, LTE, 5G
Oppo F31
- Announced
- 2025, September 17
- Status
- Available. Released 2025, September 27
Oppo K15x
- Announced
- 2026, October 02
- Status
- Available. Released 2026, October 02
Oppo F31
- Dimensions
- 158.2 x 75 x 8 mm (6.23 x 2.95 x 0.31 in)
- Weight
- 185 g (6.53 oz)
- SIM
Nano-SIM + Nano-SIM
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)
MIL-STD-810H compliant*
* does not guarantee ruggedness or use in extreme conditions
Oppo K15x
- Dimensions
- 166.6 x 78.5 x 8.6 mm (6.56 x 3.09 x 0.34 in)
- Weight
- 212 g (7.48 oz)
- Build
- Glass front, plastic frame, plastic back
- SIM
Nano-SIM + Nano-SIM
IP64 dust tight and water resistant (water splashes)
Oppo F31
- Type
- AMOLED, 1B colors, 120Hz, 600 nits (typ), 1400 nits (HBM)
- Size
- 6.57 inches, 105.0 cm2 (~88.5% screen-to-body ratio)
- Resolution
- 1080 x 2372 pixels (~397 ppi density)
- Protection
- AGC DT-Star D+
Oppo K15x
- Type
- IPS LCD, 120Hz, 1125 nits (peak)
- Size
- 6.75 inches, 111.4 cm2 (~85.2% screen-to-body ratio)
- Resolution
- 720 x 1570 pixels, 19.5:9 ratio (~256 ppi density)
Oppo F31
- OS
- Android 15, ColorOS 15
- Chipset
- Mediatek Dimensity 6300 (6 nm)
- CPU
- Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
- GPU
- Mali-G57 MC2
Oppo K15x
- OS
- Android 16, ColorOS 16
- Chipset
- Mediatek Dimensity 6300 (6 nm)
- CPU
- Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
- GPU
- Mali-G57 MC2
Oppo F31
- Card slot
- microSDXC
- Internal
128GB 8GB RAM, 256GB 8GB RAM
UFS 2.2
Oppo K15x
- Card slot
- microSDXC
- Internal
128GB 6GB RAM, 256GB 6GB RAM
UFS 2.2
Oppo F31
- Dual
50 MP, f/1.8, (wide), PDAF
Auxiliary lens
- Features
- LED flash, HDR, panorama
- Video
- 1080p@30/60/120fps
Oppo K15x
- Dual
13 MP, f/2.2, 27mm (wide), AF
Auxiliary lens
- Features
- LED flash, HDR, panorama
- Video
- 1080p@30/60fps
Oppo F31
- Single
- 16 MP, f/2.4, (wide)
- Features
- Panorama
- Video
- 1080p@30fps
Oppo K15x
- Single
- 5 MP, f/2.2, 27mm (wide)
- Features
- Panorama
- Video
- 1080p@30fps
Oppo F31
- Loudspeaker
- Yes, with stereo speakers
- 3.5mm jack
- No
Oppo K15x
- Loudspeaker
- Yes
- 3.5mm jack
- Yes
Oppo F31
- WLAN
- Wi-Fi 802.11 a/b/g/n/ac, dual-band
- Bluetooth
- 5.4, A2DP, LE, aptX HD
- Positioning
- GPS, GALILEO, GLONASS, BDS, QZSS
- NFC
- No
- Radio
- Unspecified
- USB
- USB Type-C 2.0, OTG
Oppo K15x
- WLAN
- Wi-Fi 802.11 a/b/g/n/ac, dual-band
- Bluetooth
- 5.4, A2DP, LE, aptX HD
- Positioning
- GPS, GALILEO, GLONASS, QZSS
- NFC
- Yes
- Radio
- No
- USB
- USB Type-C 2.0, OTG
Oppo F31
- Sensors
- Fingerprint (under display, optical), accelerometer, proximity, compass
Oppo K15x
- Sensors
- Fingerprint (side-mounted), accelerometer, proximity, compass
Oppo F31
- Type
- Si/C Li-Ion 7000 mAh
- Charging
80W wired, 33W PPS, 13.5W PD
Reverse wired charging
Oppo K15x
- Type
- 6500 mAh
- Charging
45W wired
5W reverse wired
Oppo F31
- Colors
- Midnight Blue, Bloom Red, Cloud Green
- Models
- CPH2781
- SAR
- 1.18 W/kg (head) 0.81 W/kg (body)
- Price
- About 230 EUR
Oppo K15x
- Colors
- Purple, White
- Models
- PLT150
- Price
- About 230 EUR
How the Oppo F31 and Oppo K15x differ
- The Oppo F31 has a larger battery, 7000 mAh against 6500 mAh on the Oppo K15x.
- The Oppo K15x has the bigger screen, 6.75 inches against 6.57 inches.
- The Oppo F31 offers more RAM, up to 8 GB against 6 GB.
- The main cameras are 50 MP on the Oppo F31 and 13 MP on the Oppo K15x.
- The Oppo K15x is the newer of the two, released in October 2026.