The ornamental design for a phone or tabletstand, as shown and described.
FIG. 1 is a top, front and right perspective view of a phone or tablet stand;
FIG. 2 is a bottom, rear and left perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a top, front and right perspective view thereof, shown in an alternate position and in an environment of use.
The broken lines shown in FIGS. 2 and 7 illustrate portions of the phone or tablet stand that form no part of the claimed design. The broken lines in FIG. 8 illustrate environment that form no part of the claimed design.