[radeonxt]

Esto marca en las características del CHIP:

State of the art HSPA+ (High-Speed Packet Access) Release 7 modem

http://www.stericsson.com/products/u8500-novathor.jsp

2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100 - LT22i

http://www.gsmarena.com/sony_xperia_p-4436.php