DoCoMo shows HSDPA cellphone prototypes

K-Tai Watch reports that DoCoMo has unveiled three prototypes for its 2Q06-launching HSDPA (High-Speed Downlink Packet Access) service. HSDPA is W-CDMA with a firework up its rear; downlink speeds can theoretically reach 14.4Mbps versus the 384Kbps that DoCoMo's current FOMA service achieves. However, the current prototypes max out at 3.6Mbps, as (so the good folks at K-Tai Watch explain) DoCoMo has chosen to go with Category 6 of HSDPA, Category 10 being required to get the top speeds. Whether this will feed through to the production models is unclear.

Among the prototypes, news of note is that Motorola is responsible for one of the three (pictured right), and it's based on the RAZR V3x--which is a handset we'd be pleased to see make it to Japan, providing DoCoMo resists the urge to downgrade its functionality and lock it up like they did with the A1000/M1000.

[Via K-Tai Watch (Japanese)]