It looks like unless you preordered on Sprint, the stores and anyone but Sprint telesales will not get them 4/27.
Tmobiles are also delayed until 4/29.
Sprint Samsung Galaxy S4 Delayed; Pre-Orders Hope To Be Fulfilled On April 27 | Ubergizmo
Tmobiles are also delayed until 4/29.
Sprint Samsung Galaxy S4 Delayed; Pre-Orders Hope To Be Fulfilled On April 27 | Ubergizmo