The Sony Ericsson W610i phone is based on the Sony Ericsson K550 and Sony Ericsson K610i. It is a quad-band GSM phone, but it does not offer 3G (UMTS or HSDPA).
This phone is built upon the foundations of the Sony Ericsson K550 and K610i devices. It functions as a quad-band GSM phone but does not incorporate 3G capabilities (UMTS or HSDPA).