苹果iPhone终于能开通电信VoLTE了
3月26日，苹果正式推送了iOS 12.2版本更新，新增4种动话表情、支持全新AirPods（第2代），改进Apple Pay等功能。与此同时，升级后的iPhone也支持电信VoLTE了。
中国电信官方微博也放出开通方式，把苹果手机VoLTE功能打开拢共分三步：
1、升版本—通过苹果版本更新（iPhone 6以上机型iOS版本升级到12.2，运营商版本36.1）
2、开业务--营业厅、短信等办理途径。最简单的方式就是编辑短信内容“KTVoLTE”至10001。
3、拨开关—设置打开VoLTE开关（默认关闭）
VoLTE即Voice over LTE，通过4G网络与IP传输技术，实现数据、语音、视频及短/彩信业务由LTE统一承载，目前已提供高清语音、视频通话服务，通话质量比普通语音有极大提高，语音接续可“秒通”。
有网友反馈称，开通VoLTE后，出现“无法激活4G通话”的弹窗，中国电信给出的建议是拨打10000客服热线咨询反馈。有网友表示遇到这种问题可以试试重启手机。
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