摩托罗拉xt502官方2.2刷机包有吗？没有的话给个刷机教程吧，谢谢了！

http://direct.motorola.com/CHI/SoftwareUpdateSummary.asp?country=CHN&language=CHI&web_page_name=SUPPORT&strCarrierId=&strPhone=MileStone%20XT502%28Android%202.2%29&strCable=Mini%20USB%20Data%20Cable&strURL=No%20URL