因为4G网络不支持传统语音业务,所以用户在拨打电话的时候会进行网络回落,即变回3G。
我国的电话通信主要是使用GSM和CDMA,所以当你打电话时,手机会自动将手机信号切换到GSM或CDMA,也就是说通话时,手机信号处于2G或3G信号。移动手机一般打电话时处于2G信号,联通手机一般处于3G信号。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/5bafa40f4bfbfbed9d66ae0168f0f736afc31f94?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
扩展资料
解决方法:可以打开VoLTE功能:
1、直接打开自己的手机桌面,选择设置进入。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/d8f9d72a6059252dd168155c3b9b033b5bb5b96e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2、这个时候弹出新的窗口,需要在图示位置点击更多跳转。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4ec2d5628535e5dddad7ac8779c6a7efcf1b62ea?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3、下一步如果没问题,就继续确定查看移动网络。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/e4dde71190ef76c698adf3739216fdfaaf51676e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4、这样一来等启动相关按钮以后,即可设置volte了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a9d3fd1f4134970a5a8819779acad1c8a6865dea?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)