We claim the onrnamental design for an armband for mobile phone, as shown and described.
FIG. 1 is a front view of the armband for mobile phone showing our new design;
FIG. 2 is a rear view of the armband for mobile phone;
FIG. 3 is a right side view of the armband for mobile phone;
FIG. 4 is a left side view of the armband for mobile phone;
FIG. 5 is a right perspective view of the armband for mobile phone;
FIG. 6 is a left perspective view of the armband for mobile phone; and,
FIG. 7 is a rear perspective view of the armband for mobile phone.
The interior of the armband for mobile phone, as shown in FIGS. 2, 3, and 7 as unshaded surfaces and broken lines on the unshaded surfaces, forms no part of the claimed design. The broken lines on the armband for mobile phone that are immediately adjacent the shaded surfaces represent boundaries of the claimed design. All other broken lines throughout the drawing figures depict unclaimed environment. The broken lines form no part of the claimed design.