Screen size
equal specsmy521x1.9"
my901C1.9"
Quick verdict
my521x and my901C are close on the measured specs.
Measured wins
my521x
3
spec wins
Ties
4
equal specs
my901C
3
spec wins
Screen size
equal specsTechnology
my521x
GSM
my901C
GSM / UMTS
2G bands
my521x
GSM 900 / 1800 / 1900
my901C
GSM 900 / 1800 / 1900
GPRS
my521x
Yes
my901C
-
EDGE
my521x
No
my901C
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
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
-
3G bands
my521x
-
my901C
UMTS 2100
Speed
my521x
-
my901C
Yes, 384 kbps
Announced
my521x
2008, July
my901C
2007, March. Released 2008, February
Status
my521x
Discontinued
my901C
Discontinued
Dimensions
my521x
107 x 46 x 10 mm (4.21 x 1.81 x 0.39 in)
my901C
90 x 45 x 23.5 mm (3.54 x 1.77 x 0.93 in)
Weight
my521x
90 g (3.17 oz)
my901C
115 g (4.06 oz)
SIM
my521x
Mini-SIM
my901C
Mini-SIM
Type
my521x
TFT, 65K colors
my901C
TFT, 256K colors
Size
my521x
1.9 inches, 11.4 cm2 (~23.1% screen-to-body ratio)
my901C
1.9 inches, 11.2 cm2 (~27.6% screen-to-body ratio)
Resolution
my521x
128 x 160 pixels (~108 ppi density)
my901C
240 x 320 pixels, 4:3 ratio (~211 ppi density)
Other
my521x
-
my901C
Second external TFT, 256K colors display (96 x 64 pixels)
Card slot
my521x
microSD (dedicated slot)
my901C
miniSD
Phonebook
my521x
Yes
my901C
Yes
Call records
my521x
20 dialed, 20 received, 20 missed calls
my901C
20 dialed, 20 received, 20 missed calls
Internal
my521x
10MB
my901C
-
Single
my521x
1.3 MP
my901C
2 MP
Video
my521x
Yes
my901C
Yes
Other
my521x
No
my901C
-
Single
my521x
-
my901C
VGA videocall camera
Video
my521x
-
my901C
Loudspeaker
my521x
No
my901C
No
Alert types
my521x
Vibration; Polyphonic(32) ringtones
my901C
Vibration; Downloadable polyphonic ringtones
3.5mm jack
my521x
No
my901C
No
WLAN
my521x
No
my901C
No
Bluetooth
my521x
Yes
my901C
2.0, A2DP
Positioning
my521x
No
my901C
No
Radio
my521x
No
my901C
No
USB
my521x
Proprietary
my901C
Proprietary
Sensors
my521x
my901C
Messaging
my521x
SMS, EMS, MMS
my901C
SMS, EMS, MMS, Email
Browser
my521x
WAP 2.0/xHTML
my901C
WAP 2.0/xHTML
Games
my521x
Yes
my901C
Yes
Java
my521x
Yes, MIDP 2.0
my901C
Yes, MIDP 2.0
Other
my521x
MP3/AAC player Predictive text input Organizer
my901C
Video telephony & streaming MP3/AAC player Predictive text input Organizer Voice memo
Type
my521x
Removable Li-Ion battery
my901C
Removable Li-Ion battery
Stand-by
my521x
Up to 200 h
my901C
Up to 300 h
Talk time
my521x
Up to 3 h
my901C
Up to 5 h
Colors
my521x
Black,Silver
my901C
Black, Dark Blue, Dark Red