Things are strange when you're dealing with CDMA carriers, and doubly so when it's an MVNO. You've been able to buy the Galaxy S4 and HTC One (M7) since they came out last year on Ting, but now inactive Sprint devices can be ported to Ting.
Samsung officially launched the Galaxy S5 globally last Friday, making it available for purchase at retailers all over the world. That said, not everyone is able to get their hands on it just yet. Sprint MVNO Ting isn't able to offer the devices at the same time as the carrier it's reliant on - but at least this time the wait isn't too long. Ting Galaxy S5 pre-orders are now available, with devices shipping out May 5th.
Full disclosure - Ting is my mobile provider of choice. I may write about the constant tug-of-war between the big four American carriers, but at the end of the day, I refuse to sign a two-year contract with anyone, and T-Mobile has precisely zero coverage in the drastically non-urban corner of the US that I'm from. Thankfully, I have options. Ting is celebrating its two-year anniversary this week, and it's doing so by slashing its data prices.