x.xx.709.x - Asia TW (Taiwan)
cidnum: HTC__621
Download:
firmware.zip from 3.14.709.16
http://goo.gl/wA7VO
flash firmware.zip using following terminal commands:
fastboot oem rebootRUU
fastboot flash zip firmware.zip
RUUs variants:
x.xx.61.x - Orange UK (United Kingdom)
x.xx.69.x - Orange PL (Poland)
x.xx.73.x - Orange FR (France)
x.xx.75.x - Orange ES (Spain)
x.xx.110.x - T-Mobile UK (United Kingdom)
x.xx.111.x - T-Mobile DE (Germany)
x.xx.113.x - T-Mobile CZ (Czech Republic)
x.xx.161.x - Vodafone UK (United Kingdom)
x.xx.163.x - Vodafone FR (France)
x.xx.165.x - Vodafone IT (Italy)
x.xx.168.x - Vodafone GR (Greece)
x.xx.206.x - O2 UK (United Kingdom)
x.xx.401.x - World Wide English
x.xx.468.x - Turkey
x.xx.497.x - Morocco
x.xx.498.x - WWE Brightpoint US (United States)
x.xx.531.x - T-Mobile US (United Kingdom)
x.xx.666.x - Bell Canada
x.xx.707.x - Asia WWE (World Wide English)
x.xx.709.x - Asia TW (Taiwan)
x.xx.720.x - Asia India
x.xx.771.x - Hutchison 3G UK (United Kingdom)
x.xx.841.x - Telsra WWE (World Wide English)
x.xx.862.x - Voda-Hutch AU (Australia)
x.xx.901.x - TIM IT (Italy)
x.xx.911.x - SK Telecom (South Korea)
x.xx.1400.x - HTC China
x.xx.1403.x - HTC China CMCC (China Mobile Communications Corporation)
fuente
http://forum.xda-developers.com/show....php?t=1957376