title: Send a cellphone SMS text without the use of a third-party service
body: <p>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).</p>
  
  <p>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).</p>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>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.</p>
  
  <p><a href="https://play.google.com/store/apps/details?id=eu.apksoft.android.smsgateway&amp;hl=en" rel="nofollow">https://play.google.com/store/apps/details?id=eu.apksoft.android.smsgateway&amp;hl=en</a></p>