I have a an method that retrieves Groups that are present in certain areas. Groups are given a country_id, region_id and city_id
1、通过iTunes将苹果手机与电脑连接起来，进入DFU模式。2、下载iTunes 并进行安装,安装成开发者_如何转开发功后打开，会出现此界面。3、手机进入dfu模式。4、开机状态下，将手机与电脑连接
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