摘要：据外媒报道，AT&T已经悄然在部分选定地区开启了跨网VoLTE功能。不过在一份简要的声明中，该公司并未透露对方具体是哪一家运营商。显然，这项技术最终将面向所有运营商开放。对于iPhone用户来...
Abstract: According to foreign media reports, AT & T has quietly opened the inter-network VoLTE functionality in some selected areas. However, in a brief statement, the company did not disclose the other party specifically which one operator. Clearly, the technology will eventually be open to all operators. For iPhone users to ...
