国家再三支持 但“携号转网”工作为何进行缓慢？
一直以来，移动、联通、电信三家运营商独立运营，但在携号转网之下，趋于“融合”。所谓携号转网，也被称为号码可携带、移机不改号，主要包括固定号码携带和移动号码携带两种。当前，简化携号转网流程是为了减少转出障碍，推动转网全面推行。携号转网有利于优化市场结构，实现有效竞争。
其实，携号转网早在2006年便已经开始实施，但是为什么一直推进缓慢呢？
携号转网进展缓慢，技术及系统支持改造投资较大是重要原因。携号转网技术支持准备涉及网络改造、用户系统改造、数据库建设、系统测试和业务试用等多方面工作。同时，在试点过程中发现了很多问题，比如运营商之间的结算、建立实现全网数据同步的第三方集中数据库系统等，要实现这些技术改造成本巨大。
不仅如此，双卡双待手机的普及也是阻碍携号转网工作进行的重要原因。在当前运营商普遍提速降费大形势下，资费差异已经不大，手机双卡双待十分普及，耗资巨大的携号转网已经意义不大。
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