I searched the forum and a little confused about what phone can use the sim card sells in Japan. We are going to stay in Japan for 15 days.
We have two unlocked AT&T phones and would like to find out if the two phones can use the Japanese SIM card:
1) LG Quantum C900 (quad-band GSM device with WCDMA modes for international use).
2) LG GT550 Encore (It runs on the 850/900/1800/1900 MHz GSM/GPRS/EDGE frequencies as well as AT&T's dual-band 3G network (850/1900 MHz; HSDPA/UMTS)
Thank you very much for your advice.