Please don't pave over `number`, it results in _no_ _number_ being shown: 

<img src="http://gyazo.com/590348cd377bd372a698a773e077fd60.png">

This newly generated carrier/type string should be assigned to `type` here: https://github.com/mozilla-b2g/gaia/blob/master/apps/sms/js/thread_ui.js#L1519