Screen size
BT1031.9"
C61Winner: 6.9"+72%
Quick verdict
C61 leads the measured specs 14-2.
Measured wins
BT103
2
spec wins
Ties
3
equal specs
C61
14
spec wins
Overall winner
Screen size
Technology
BT103
No cellular connectivity
C61
GSM / HSPA / LTE
2G bands
BT103
N/A
C61
GSM 850 / 900 / 1800 / 1900
3G bands
BT103
N/A
C61
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
BT103
N/A
C61
Resolution
Refresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
Stereo speakers
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66
Speed
BT103
No
C61
HSPA, LTE
GPRS
BT103
No
C61
-
EDGE
BT103
No
C61
-
Announced
BT103
2024, June
C61
2025, March
Status
BT103
Available. Released 2024, June
C61
Available. Released 2025, May
Dimensions
BT103
49.5 x 40 x 10.9 mm (1.95 x 1.57 x 0.43 in)
C61
170.7 x 79.6 x 9.5 mm (6.72 x 3.13 x 0.37 in)
Weight
BT103
100 g (3.53 oz)
C61
216 g (7.62 oz)
SIM
BT103
No
C61
Nano-SIM + Nano-SIM
Type
BT103
TFT LCD
C61
IPS LCD, 90Hz, 450 nits
Size
BT103
1.91 inches
C61
6.88 inches, 112.4 cm2 (~82.7% screen-to-body ratio)
Resolution
BT103
320 x 380 pixels (~260 ppi density)
C61
720 x 1640 pixels (~260 ppi density)
Protection
BT103
Tempered glass
C61
Corning Gorilla Glass, Mohs level 5
OS
BT103
Proprietary OS
C61
Android 15
Chipset
BT103
-
C61
Unisoc T615 (12 nm)
CPU
BT103
-
C61
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
GPU
BT103
-
C61
Mali-G57 MP1
Card slot
BT103
No
C61
microSDXC (uses shared SIM slot)
Internal
BT103
-
C61
128GB 4GB RAM
Other
BT103
No
C61
-
Loudspeaker
BT103
No
C61
Yes
3.5mm jack
BT103
No
C61
No
WLAN
BT103
No
C61
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
BT103
5.2
C61
5.0, A2DP, LE
Positioning
BT103
No
C61
GPS, GALILEO, GLONASS, BDS
NFC
BT103
No
C61
Yes
Radio
BT103
No
C61
FM radio
USB
BT103
No
C61
USB Type-C
Sensors
BT103
Accelerometer, heart rate, SpO2
C61
Fingerprint (side-mounted), accelerometer, compass
Type
BT103
300 mAh
C61
Li-Po 5150 mAh
Charging
BT103
-
C61
10W wired
Colors
BT103
Black, White
C61
Gold, Purple, Blue, Black
Price
BT103
-
C61
$ 114.99 / £ 81.99
Single
BT103
-
C61
13 MP, f/2.2, (wide), 1/3.06", AF
Features
BT103
-
C61
LED flash, HDR, panorama
Video
BT103
-
C61
1080p@30fps
Single
BT103
-
C61
5 MP, f/2.2, (wide), 1/5.0"
Video
BT103
-
C61
720p@30fps