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 Transfer Apps From a MacBook to an iPad

Turn on your iPad and connect it to your MacBook using a USB data cable. Open iTunes if it does not open automatically and then slide the tab on the iPad's screen to the right to disable automatic sync.
Click the device icon for your iPad in the left column of the iTunes window to access your 'Summary' window and then click the 'Apps' tab.
Check the box next to 'Sync Apps.' You need to do this even if you use the manual management feature for music and videos.
Check the box for each app that you want to sync. Apps with boxes left unchecked will not be imported to your iPad but will remain in your iTunes library.
Drag and drop apps in the screen on the right to arrange and organize them. Drop one app on top of another to create a folder. Drag an app icon to the bottom of the last page to create a new home screen page.
Click the 'Apply' button to sync your iPad and save your changes.
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How to Fix Error 21 on an iPad

Make sure you're logged in to your computer with an administrative account. If you're not certain, log out and then log in with an admin account.
Update to the latest version of iTunes on your computer by clicking the iTunes 'Help' menu and selecting 'Check for Updates.' If you don't see the Help menu, press 'Ctrl-B' on the keyboard to reveal the Menu bar.
Update Windows. If you don't have Windows' default automatic updates enabled, install any updates manually. Press the 'Windows' key from the Start screen, select 'Settings and then 'Change PC Settings.' Select 'Update and Recovery,' followed by 'Windows Update.' Click 'Check Now.' If there is an update available, follow the onscreen prompts to install it.
Confirm that any security software you installed on your computer is up to date. Windows security software is updated when you do a Windows update.
Unplug all USB devices connected to your computer except for the keyboard and mouse. Examine the iPad's Lightning cable to ensure it is in good repair and then plug it in to a USB port you know is working properly on the computer .
Restart the computer and the iPad. Launch iTunes and try to update or restore the iPad.
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