Screen size
Signature 27Winner: 6.8"+49%
XT3903.5"
Quick verdict
Signature 27 leads the measured specs 18-4.
Measured wins
Signature 27
18
spec wins
Overall winner
Ties
0
equal specs
XT390
4
spec wins
Screen size
Technology
Signature 27
GSM / HSPA / LTE / 5G
XT390
GSM / HSPA
2G bands
Signature 27
GSM 850 / 900 / 1800 / 1900
XT390
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
Signature 27
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
XT390
HSDPA 850 / 2100
4G bands
Signature 27
LTE
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
SD card
Stereo speakers
XT390
-
5G bands
Signature 27
SA/NSA/Sub6
XT390
-
Speed
Signature 27
HSPA, LTE, 5G
XT390
HSPA 7.2/5.76 Mbps
Announced
Signature 27
2026, September 22
XT390
2012, April. Released 2012, Q4
Status
Signature 27
Coming soon. Exp. release 2026, Oct-Nov
XT390
Discontinued
Dimensions
Signature 27
-
XT390
116 x 63.5 x 11 mm (4.57 x 2.5 x 0.43 in)
Weight
Signature 27
-
XT390
110 g (3.88 oz)
Build
Signature 27
Glass front (Gorilla Glass Victus 2), aluminum frame
XT390
-
SIM
Signature 27
Nano-SIM + Nano-SIM
XT390
Dual SIM (Mini-SIM, dual stand-by)
Other
Signature 27
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
XT390
-
Type
Signature 27
LTPO AMOLED, 1B colors, 165Hz, Dolby Vision, HDR10+
XT390
TFT, 256K colors
Size
Signature 27
6.8 inches, 112.4 cm2
XT390
3.5 inches, 36.5 cm2 (~49.5% screen-to-body ratio)
Resolution
Signature 27
1264 x 2780 pixels (~449 ppi density)
XT390
320 x 480 pixels, 3:2 ratio (~165 ppi density)
Protection
Signature 27
Corning Gorilla Glass Victus 2
XT390
-
OS
Signature 27
Android 17, up to 7 major OS updates
XT390
Android 2.3.6 (Gingerbread)
Chipset
Signature 27
Qualcomm SM8975 Snapdragon 8 Elite Extreme Gen 6 (2 nm)
XT390
Mediatek MT6573 (65 nm)
CPU
Signature 27
Octa-core (2x5.01 GHz Prime + 3x4.03 GHz Performance + 3x3.74 GHz Performance)
XT390
800 MHz Cortex-A9
GPU
Signature 27
Adreno 850
XT390
PowerVR SGX531
Card slot
Signature 27
No
XT390
microSDHC (dedicated slot)
Internal
Signature 27
256GB 12GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
XT390
512MB 512MB RAM
Other
Signature 27
UFS 4.1
XT390
-
Triple
Signature 27
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
XT390
-
Features
Signature 27
Dual-LED flash, HDR, panorama
XT390
-
Video
Signature 27
8K@30fps (Dolby Vision), 4K@30/60fps (Dolby Vision), 4K@120fps, 1080p@30/60/120/240fps, 10-bit HDR10+, gyro-EIS
XT390
480p@30fps
Single
Signature 27
-
XT390
3.15 MP
Single
Signature 27
50 MP, f/2.0, 21mm (wide), 1/2.93", 0.6µm, dual-pixel PDAF
XT390
-
Features
Signature 27
HDR
XT390
-
Video
Signature 27
4K@30/60fps, 1080p@30/60/120/240fps, HDR
XT390
-
Other
Signature 27
-
XT390
No
Loudspeaker
Signature 27
Yes, with stereo speakers (with Dolby Atmos)
XT390
Yes
3.5mm jack
Signature 27
No
XT390
Yes
Other
Signature 27
24-bit/192kHz Hi-Res & Hi-Res Wireless audio Sound by Bang & Olufsen
XT390
-
WLAN
Signature 27
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
XT390
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
Signature 27
6.0, A2DP, LE
XT390
3.0, A2DP, EDR
Positioning
Signature 27
GPS, GLONASS, GALILEO, BDS, NavIC
XT390
GPS, A-GPS
NFC
Signature 27
Yes
XT390
-
Radio
Signature 27
No
XT390
No
USB
Signature 27
USB Type-C 3.1 Gen2, OTG, DisplayPort 1.4
XT390
microUSB 2.0
Sensors
Signature 27
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
XT390
Accelerometer, proximity, compass
Other
Signature 27
Smart Connect (Ready For) support Ultra Wideband (UWB) support
XT390
MP3/WAV/AAC+ player MP4/H.264/WMV player Document viewer Photo viewer Organizer Voice memo/dial Predictive text input
Type
Signature 27
Si/C Li-Ion 7000 mAh
XT390
Removable Li-Ion battery
Charging
Signature 27
90W wired 50W wireless 10W reverse wireless 5W reverse wired
XT390
-
Stand-by
Signature 27
-
XT390
Up to 220 h
Talk time
Signature 27
-
XT390
Up to 6 h
Colors
Signature 27
Pantone: Coal Smoke, Capulet Olive
XT390
Champagne, truffle black
Price
Signature 27
-
XT390
About 210 EUR