Twitter also seems to require a cell phone number from one of the big 4 carriers in the USA to register now. I had no luck registering with my US Cellular #, or

Twitter also seems to require a cell phone number from one of the big 4 carriers in the USA to register now. I had no luck registering with my US Cellular #, or my Inland Cellular #, the Google Voice number I have, or my work's Comcast number (which does SMS just fine).