There are many free services such as Pinger to obtain free numbers in which you can use for texting.
However Twitter has blocked almost all of these free services.
They use only a certain block of numbers and they have all been blacklisted.
The solution? Use a Google voice number. Follow the steps in this tutorial on how to easily verify as many Twitter accounts as you like. T
his tutorial can also be used when needing a phone number for creating a Twitter app. And it is completely free.
> woorkup.com/how-to-bypass-the-twitter-phone-verification-for-new-account/