My carrier (T-Mobile, UK) is not on the list of carriers that Twitter supports. So I attempted to add my phone using SMS. It looks like it was successful (I received an email suggesting that Twitter has added my phone to the account) but I can't see anything on the devices page and on the settings and security page it's saying that I still need to add a device.
I've tried submitting something to Twitter support, but it's been over two weeks and there hasn't been a response.
Anyone know what I'm doing wrong (aside from having a non-supported carrier)?