Duke Blue Devils Apple iPhone 4 & 4S Silicone TPU Gel Case By Tribeca by Tribeca. $17.99. Officially licensed.. Easy access to all ports and touchscreen. Durable laser-engraved team logo. Enhanced device grip. Fits Verizon, AT&T, and Sprint iPhone 4 and 4S. Wrap your iPhone 4 and 4S Team Spirit! Tribecas TPU Case protects your iPhone 4 and 4S with a flexible, durable TPU material. The laser-engraved logo will not fade or rub off.