Screen size
C257—
Signature 27Winner: 6.8"
Quick verdict
Signature 27 leads the measured specs 18-2.
Measured wins
C257
2
spec wins
Ties
2
equal specs
Signature 27
18
spec wins
Overall winner
Screen size
Technology
C257
GSM
Signature 27
GSM / HSPA / LTE / 5G
2G bands
C257
GSM 900 / 1800 , GSM 850 / 1900 - T250a
Signature 27
GSM 850 / 900 / 1800 / 1900
GPRS
C257
Class 8
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-
EDGE
C257
No
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Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
NFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
-
3G bands
C257
-
Signature 27
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
C257
-
Signature 27
LTE
5G bands
C257
-
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SA/NSA/Sub6
Speed
C257
-
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HSPA, LTE, 5G
Announced
C257
2005, Q3
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2026, September 22
Status
C257
Discontinued
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Coming soon. Exp. release 2026, Oct-Nov
Dimensions
C257
109.9 x 49.9 x 14.9 mm, 74 cc (4.33 x 1.96 x 0.59 in)
Signature 27
-
Weight
C257
91 g (3.21 oz)
Signature 27
-
SIM
C257
Mini-SIM
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Nano-SIM + Nano-SIM
Build
C257
-
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Glass front (Gorilla Glass Victus 2), aluminum frame
Other
C257
-
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IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.2m for 30 min) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Type
C257
TFT, 65K colors
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LTPO AMOLED, 1B colors, 165Hz, Dolby Vision, HDR10+
Size
C257
Signature 27
6.8 inches, 112.4 cm2
Resolution
C257
128 x 160 pixels
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1264 x 2780 pixels (~449 ppi density)
Other
C257
Downloadable wallpapers, screensavers
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-
Protection
C257
-
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Corning Gorilla Glass Victus 2
Card slot
C257
No
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No
Phonebook
C257
100 entries
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-
Call records
C257
10 dialed, 10 received, 10 missed calls
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-
Internal
C257
1MB
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256GB 12GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Other
C257
-
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UFS 4.1
Other
C257
No
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-
Loudspeaker
C257
Yes
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Yes, with stereo speakers (with Dolby Atmos)
Alert types
C257
Vibration; Downloadable polyphonic ringtones
Signature 27
-
3.5mm jack
C257
No
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No
Other
C257
-
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24-bit/192kHz Hi-Res & Hi-Res Wireless audio Sound by Bang & Olufsen
WLAN
C257
No
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Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Bluetooth
C257
No
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6.0, A2DP, LE
Positioning
C257
No
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GPS, GLONASS, GALILEO, BDS, NavIC
Radio
C257
No
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No
USB
C257
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USB Type-C 3.1 Gen2, OTG, DisplayPort 1.4
NFC
C257
-
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Yes
Sensors
C257
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Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
Messaging
C257
SMS, EMS, MMS
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-
Browser
C257
WAP 1.2
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-
Games
C257
Yes
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-
Java
C257
No
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-
Other
C257
iTap Organizer Stopwatch
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Smart Connect (Ready For) support Ultra Wideband (UWB) support
Type
C257
Removable Li-Ion 820 mAh battery
Signature 27
Si/C Li-Ion 7000 mAh
Stand-by
C257
Up to 250 h
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-
Talk time
C257
Up to 7 h 30 min
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-
Charging
C257
-
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90W wired 50W wireless 10W reverse wireless 5W reverse wired
Colors
C257
Black
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Pantone: Coal Smoke, Capulet Olive
OS
C257
-
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Android 17, up to 7 major OS updates
Chipset
C257
-
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Qualcomm SM8975 Snapdragon 8 Elite Extreme Gen 6 (2 nm)
CPU
C257
-
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Octa-core (2x5.01 GHz Prime + 3x4.03 GHz Performance + 3x3.74 GHz Performance)
GPU
C257
-
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Adreno 850
Triple
C257
-
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50 MP, (wide), 1/1.28", 1.22µm, PDAF, OIS 200 MP, (periscope telephoto), PDAF, OIS, 5x optical zoom 50 MP, f/2.0, 12mm, 122˚ (ultrawide), 1/2.76", 0.64µm, PDAF
Features
C257
-
Signature 27
Dual-LED flash, HDR, panorama
Video
C257
-
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8K@30fps (Dolby Vision), 4K@30/60fps (Dolby Vision), 4K@120fps, 1080p@30/60/120/240fps, 10-bit HDR10+, gyro-EIS
Single
C257
-
Signature 27
50 MP, f/2.0, 21mm (wide), 1/2.93", 0.6µm, dual-pixel PDAF
Features
C257
-
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HDR
Video
C257
-
Signature 27
4K@30/60fps, 1080p@30/60/120/240fps, HDR