The date when this device was launched and first available for purchase
Android 5.1 (Lollipop)
Rear camera resolution
Internal storage size
Second generation network (2G) is the most common network type, and includes GSM and GPRS. 2.75G is often of EDGE/EGPRS type. Third generation (3G) includes UMTS (W-CDMA) and is fast (useful for mobile internet).