在不使用第三方服务的情况下发送手机短信[关闭]

Question

Is it possible using a Windows Server, .NET, C# or PHP to send a SMS text message to q customer's cell phone without depending upon a third-party service (excluding an API provided by a phone company).

My require is to use SMS text messaging to automate authentication when resetting a customer's password, and I have security issues were I'd rather not use a third-party. The more I can keep this internal to our project the better (unless you can justify security in your answer).

UPDATE:

We've decided to use a SMS relay app and this was so easy to implement. There are many apps that already do this. Here is one I'm going to try.

https://play.google.com/store/apps/details?id=eu.apksoft.android.smsgateway&hl=en

Answer 1

you can build a simple mobile app that can query your api and send messages directly from the phone its running on. simple, cheap and you're in control!

we have this solution in a project Im working on atm and it seems to work great. Look up http request and using sms/send message. At least on Android this can be done with just a handful of lines of code :)