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So SMS in HSPA is sent via the circuit switched network, rather than the data network, using the signalling space. LTE is actually a bit more complex, as it moves from a circuit switched, to a packet switched world. LTE itself doesn't have a component for Voice or SMS, unless the Phone and network are VoLTE (Voice over LTE) and SMSoIP (SMS over IP) enabled. The technical requirements of which are outlined in GSMA IR.92 (http://www.gsma.com/newsroom/wp-content/uploads/2013/04/IR.92-v7.0.pdf). Essentially, if a phone and network are SMSoIP enabled (which requires VoLTE/IMS services to also be enabled), then the phone will send SMS using SIP

I was wondering if i can verify if a SMS was sent over IMS? All the packet switch SMS's are sent over IMS trough SMSC? Can i verify that in some way?

Edit: It's only sent over IMS if i have VoLTE / VoWifi enabled on device?, please correct me if i say something wrong.

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2 回答 2

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仅当您有权访问设备日志或 SMS 应用程序在 UI 上明确显示信息时（极不可能）

于 2020-03-03T10:29:16.093 回答
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在您的设备上尝试服务代码，我相信很多设备都允许您更改该特定选项，有时甚至更多，例如永久无线电关闭（蜂窝连接，因此甚至不能呼叫紧急情况）

于 2018-01-06T00:45:00.717 回答