The ornamental design for portable information terminal, as shown and described.
1.-5. Portable information terminal
2.1 : Perspective
2.2 : Perspective
2.3 : Perspective view showing changed state
2.4 : Perspective view showing changed state
2.5 : Front
2.6 : Back
2.7 : Right
2.8 : Left
2.9 : Top
2.10 : Bottom
Design 2 is a portable information terminal including: two housings; a flexible display portion which can be folded outward on front surfaces of the two housings; and a camera on a side surface of one of the two housings, as seen in reproduction 2.1 to 2.10.