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).
Vodafone, 2degrees, Spark, Skinny
Wi-Fi 802.11 a/b/g/n/ac/ax
AnTuTu is a leading Android benchmark that measures CPU, graphics and memory performance of a device. The higher the score, the better.