Sony Ericsson K700 - Wikipedia, the free encyclopedia The Sony Ericsson K700 was introduced in 2004 as a high-end mobile phone, and as a successor to the T630. It was succeeded by the K750. K700i ('i' for International'): GSM 900/1800/1900 for all regions except China. K700c ('c' for China): GSM 900/1800/190