Moreover, official announcements of them do not remember the version with 64 GB storage capacity, prices officially announced referring only to the 16GB version that will be priced for $199 and to the 32 Gb version, that will be priced at $249 when signing a new agreement.
Other carriers policies like T-Mobile, Sprint or Verizon was not providing yet all the details for potential buyers, but I found on sites like ebay or amazon listings of those from Sprint about Galaxy S4 smartphone, which says that the smartphone is already available for preorders, and April 11th and 12th are given as shipping dates, which means that if retailers have in stock these devices, by the end of the weekend buyers will already have in their hands this great smartphone from Sprint.