Sony Ericsson XPERIA X1 white paper shows two versions (X1a and X1c)

Sony Ericsson XPERIA X1 white paper shows two versions (X1a and X1c). There are two XPERIA X1 variants, X1a and X1c. Sony Ericsson XPERIA X1a will sport a quad-band GSM (850/900/1800/1900Mhz) radio and a tri-band (850/1900/2100Mhz) UMTS/HSPA radio for 3G data connectivity, while the X1c changes things up with a tri-band (900/1900/2100Mhz) UMTS/HSPA 3G radio.

XPERIA X1a, That ‘a’ means this device is on its way to AT&T, it will support AT&T’s HSPA network, and is quad band GSM for world wide use. This device has a few changes, such as the inability to encode h.264 videos, and also the ability to only record videos at QVGA resolution.

Sony Ericsson XPERIA X1c will be what the rest of the world see. This device is also quad band GSM, but it changes up the 3G frequencies to include the 900MHz band, which is now being used for HSPA. Each device has very respectable battery life, with 10 hours of GSM talk time and 6.5 hours of UMTS talk time.

Sony Ericsson XPERIA X1 whitepaper (PDF) is available from the website.