The following applications are related by subject matter, each of which is assigned or under obligation of assignment to the same entity as this application, and all of which were filed on even date herewith:

Application Ser. No. 29/367,498, Cellular Communications Device with Rear Power Button;

Application Ser. No. 29/367,500, Cellular Communications Device with Side Data Port;

Application Ser. No. 29/367,501, Cellular Communications Device with Elongated Bottom;

Application Ser. No. 29/367,505, Cellular Communications Device;

Application Ser. No. 29/367,507, Cellular Communications Device with Wrap-In Flaps;

Application Ser. No. 29/367,508, Cellular Communications Device with Reset Button;

Application Ser. No. 29/367,510, Cellular Communications Device with Bottom Data Port; and

Application Ser. No. 29/367,511, Cellular Communications Device with Multiple Bottom Data Ports.

FIG. 1 is a front perspective view of a cellular communications device with side slot of the present invention;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a right-side elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a back elevation view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top view thereof.

The evenly spaced broken lines shown in the drawings are directed to environment, are for informational purposes only, and form no part of the claimed design.