Indicates how much radiation the phone emits with a standard called the "Specific Absoption Rate" as measured by the EU. The lower, the better. In New Zealand and most countries, the maximum allowed rate is 2.0 W/kg.
Uses satellites to find your position. A-GPS also uses the cellular network, and S-GPS allows the phone to receive both GPS and voice data simultaneously
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).