1、可能是信号或电话运营商问题。有时候当我们在一些信号不好地方，会遇到这样的问题，出现呼叫失败，需要重拨的情况。这种情况一般是由于当前信号不好导致的，换一个地方再重新拨打就可以了。2、如果不是信号的问[详细]
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