1) Not aware n900 use sim cards ?! Do they? 2) If it does, can one buy n900 in USA and travel to china, and insert those local sim card, your phone will work? Last time I was in China, for 2 weeks duration, I bought a phone in china and bought their local sim card to use the phone locally, the total cost still cheaper than my Atnt roaming charge! Anybody has any idea about sim card in n900? Question: Do this spec implies n900 is using sim cards? ========================================== Frequency Bands GSM 1800 GSM 1900 GSM 850 GSM 900 WCDMA 1700 WCDMA 2100 WCDMA 900 Data Bearers Dual Transfer Mode (MSC 11) EDGE Class A GPRS Class A HSDPA[2] HSUPA[3] ================================================ TIA, bun