The ornamental design for a keyboard for mobilephone, as shown and described.
FIG. 1 is a front view of a keyboard for mobile phone in an environment where the mobile phone is in a slid open position;
FIG. 2 is a bottom view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a perspective view thereof;
FIG. 7 is a perspective view of the keyboard for mobile phone in an environment where the mobile phone is in a slid and tilted open position.
FIG. 8 is front view thereof; and,
FIG. 9 is another perspective view thereof.
The broken line showing of the remainder of the mobile phone is directed to environment and is for illustrative purposes only; the broken lines form no part of the claimed design.