How to Connect a Laptop to 3G (5 Steps)

Insert the SIM card into the USB modem, if your carrier requires it. Carriers like AT&T and T-Mobile use SIM cards—a small, fingernail-sized card that contains your personal cellular information. Remove the plastic cap from the modem and insert the SIM card into the slot until it clicks into place. Replace the cap.
Turn on the laptop. Insert the USB modem into an open USB port on the laptop.
Install the software by using the automatic installation wizard. The wizard should start once the laptop recognizes the presence of the new modem. Follow the prompts, accept the license agreement and click 'Install' until a window tells you that the installation is completed. Restart the laptop if prompted.
Connect to 3G with the USB modem by opening the software program that it installed. This can usually be found as a shortcut on the desktop or by opening the Start menu, clicking on 'All Programs' and looking for an application that has the name of your wireless carrier in it. Look for an option to 'Connect.' Choose this to activate the connection.
Open a web browser to test the modem.
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How to Repair a Dead Key on a Mac Keyboard (4 Steps)

Insert the end of your tweezers under the dead key and gently pry up to pop it out of place. Place the key face-down on a table or desk.
Use your tweezers to remove the plastic hinge from the bottom side of the key.
Fit the hinge in the key compartment, making sure that the clips at the side of the hinge connect securely to the metal tabs on the side of the key compartment.
Fit the key back in the key compartment and gently press down until the key snaps in place. The key should now work without any problems.
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How to Clean a MacBook Trackpad Button

Lightly dampen a piece of cloth with some plain water.
Wipe down your MacBook's trackpad with the cloth. Use broad strokes to ensure that you're catching as much grease and grime as possible.
Continue wiping until no discernable grease can be seen on the trackpad.
Take your paper or similarly thin wedge and work it gently into the perimeter of the MacBook's trackpad. If your MacBook doesn't feature a rubberized plastic bottom, run the wedge between the trackpad's mouse buttons. Newer MacBooks feature the same single trackpad-mouse button that's used on the MacBook Pro line of computers, but older models utilize a dedicated mouse button.
Continue running this wedge around the perimeter of the MacBook's trackpad and in between the mouse buttons, if your model features them. Your goal is to dislodge any crumbs or grime that has collected between the computer and trackpad. Brush aside any removed dirt to finish the cleaning process.
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