9f612c26__device____Twitter_Help_Center__ll_see_on_your_Android_device_
If you choose to use your phone number to connect with friends on Twitter, this permission allows us to automatically verify your phone-number. This also allows us to send you text messages if, for example, you choose to activate features like Twitter Alerts for critical information broadcasting.
Receive text messages (SMS)
Why is the Twitter app requesting permission to access features on my Android device? | Twitter Help Center
Android permissions (what you’ll see on your Android device)