Only the LG K30, Samsung S8, S8+, S9, S9+ are supported at launch and more expensive than buy-in them from Samsung for example the S9 64 GB is $619 at B&H, $719 at Samsung and $749 at Spectrum Mobile. No iPhones and no BYOD. Plans include $45 unlimited or $14/GB. Free calls and texting. You do have to be a customer of their Internet offering.
Totally underwhelming launch!