title: Unable to set Read-Write permission for twitter app
body: <p>I'm stuck in a weird issue while creating a twitter app.</p>
  
  <p>Here i'm supposed to build an app with read-write permission through Twitter's Application Management service ( ridiculous service actually :/ ).</p>
  
  <p>So i've created an app so far. But the problem is that, When i'm trying to set the "Read and Write" permission through Permission tab, It's throwing an error saying,
  "You must add your mobile phone to your Twitter profile before granting your application write capabilities. Please read <a href="https://support.twitter.com/articles/110250-adding-your-mobile-number-to-your-account-via-web" rel="nofollow">https://support.twitter.com/articles/110250-adding-your-mobile-number-to-your-account-via-web</a> for more information"</p>
  
  <p>Then if try i to add a mobile number through my twitter profile,
  Again it's throwing an error saying,
  "Sorry, we don't have a connection to your carrier yet!"</p>
  
  <p>P.S. I've tried all the major carriers e.g., Idea, Vodafone, BSNL, DOCOMO.</p>
  
  <p>so, plz help me get rid of this issue by any way.</p>