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Nokia Lumia 520

RM-914 · RM-915 · RM-917 · 2013–2015 · handheld

Specifications

Cpu
Qualcomm Snapdragon S4 Plus MSM8227, dual-core 1.0 GHz Krait, Adreno 305
Ram
max: 512 MB (soldered; the reason Windows 10 Mobile never officially arrived) · base: 512 MB
Modem
Quad-band GSM + HSPA+ 21 Mbps (bands vary by RM model), WiFi 802.11b/g/n, Bluetooth 4.0, GPS/GLONASS; no LTE, no NFC
Camera
5 MP, f/2.4, autofocus, no flash, 720p video; no front camera
Battery
Nokia BL-5J, 1430 mAh Li-Ion (removable behind the snap-off shell)
Display
4.0" IPS LCD, 480x800, with the exchangeable-shell design carried over from classic Nokias
Storage
base: 8 GB internal · options: microSD (commonly cited up to 64 GB)
Os Support
latest: Windows Phone 8.1 (Lumia Denim); Windows 10 Mobile was never officially offered · shipped: Windows Phone 8
Release Price
€139 before taxes (about $180); it became the best-selling Windows Phone ever

Variants

Revisions
Lumia 521RM-917T-Mobile US variant with AWS 3G bands
Colors
Yellow2013 launch shell
Red2013 launch shell
Cyan2013 launch shell
White2013 launch shell
Black2013 launch shell

Upgrade paths

storage
microSD cards, commonly run at 64 GB · Slot sits under the removable shell.
~$15
EASY
battery
Any compatible BL-5J cell · The BL-5J is shared with a long list of Nokias, so cells remain cheap and easy to find.
~$8
EASY
other
Snap-off colored shells · Whole-back shell swaps change the phone's color in seconds.
~$5
EASY