With your Vertu phone you can use the enhanced GPRS (EGPRS), general packet radio service (GPRS), high speed circuit switched data(HSCSD) and circuit switched data (CSD, GSM data) data services.
vertu.com
使用HSCSD服务对手机电池电量的消耗比普通电话或数据通话要 快。
vertu.com
Theuse of HSCSD services consumes [...]
the phone battery faster than normal voice or data calls.