The “Uncarrier” is already seeing a lot of excitement building for Samsung’s next big thing. T-Mobile CMO Mike Sievert writes that his carrier has already received 100,000 pre-registrations for the Galaxy S5 in the span of less than two days, which leads him to conclude that Samsung’s newest flagship phone “is gonna be big!” Pre-registrations aren’t the same as pre-orders, of course, since they aren’t commitments to buy a device and are only sign ups to be alerted it when it becomes available. Nonetheless, getting 100,000 pre-registers in under two days is definitely indicative of high interest in the Galaxy S5, although it will have a tough act to follow since the Galaxy S4 last year became the fastest-selling Android phone of all-time with 10 million shipments in just one month.