AT&T’s call-blocking service allows users to block calls from individual numbers. The user calls a special access number, then adds the block through the phone’s keypad. When the blocked caller calls the number, they hear a message that the number is not accepting calls. When the user wants to unblock the number, they can remove the block from the same menu. Tips

Call forwarding is a popular feature that allows you to redirect incoming telephone calls from one phone to another. For example, if you are planning a trip, you can set your Verizon landline phone at home to forward calls to your cellphone. You can also forward calls that come in to your mobile phone to a landline or even another cellphone. Call forwarding is included in all Verizon Wireless calling plans, and it is available on Verizon landline calling plans as well....

Unlocking a handset is often used to make any GSM phone work with any GSM network. Phones generally come pre-programmed by the manufacturer to work only on certain networks. These phones are called “locked” phones. GSM carriers supply phones that work by using a SIM card. If you unlock a phone, you can use the SIM card of another provider in your phone. Writer Bio

All mobile phones that come from mobile service providers are “locked” unless otherwise advertised. The term “locked” means the phones are programmed to only work with a particular mobile service company. If the user tries to insert a SIM card from a different company, an error message appears and the phone will not make or receive calls. Most standard phones, advanced SmartPhones such as the iPhone are not included, use a simple process of entering a specific code to unlock the mobile....

There may be a time when you need to unlock your Airtel SIM card. You need to unlock the code on your SIM card in order to unlock your cell phone. What that card contains is an IMEI code you need to unlock your Airtel cell phone. With the IMEI code, your cell phone provider will give you the unlock code. Once you have your unlock code, you are able to make phone calls, send text messages or surf the web with your Airtel phone....

Laptop hibernation helps conserve energy when you’ll be away from your computer for some time. In Hibernate mode, your computer writes an image of whatever you’re doing onto a file on the hard drive before shutting down almost completely. While it may take longer to boot up than when your computer is in Standby mode, Hibernate is ideal for when you’ll be away from your machine for long periods of time but want to save your settings....

If you’ve got an old Sony PlayStation 1 video game console controller lying around the house that you aren’t using anymore, consider hooking it up to your PC. You can then control all of your favorite PC gaming titles (that feature joystick support) using the familiar console made famous by Sony’s first entry into the console gaming world. Purchase the necessary adapter required to make this connection possible. Writer Bio

You can use the rear VGA or HDMI ports on your Sony Vaio to connect an external monitor to your laptop, so that you can show your laptop’s display on a larger monitor, rather than the laptop’s smaller LCD screen. You can also extend your Sony’s desktop across both its LCD screen and an external monitor. This creates a continuous desktop that can either display numerous open programs or two maximized windows....

Any digital camera can be confusing for a first time user. The instruction manual doesn’t give step by step instructions. Too many buttons on the camera can complicate a simple task. An LCD screen which all cameras have can confuse anyone. Warnings

PHP is an open-source programming language that makes it easy for you to install and use a thermal printer. Because of its open-source applications, it also supports other types of printers, such as ink jet, multifunction and label printers. You can easily install a thermal printer in your network, even if you are not fully knowledgeable in PHP programming. fwrite($handle, ’text to printer’); fclose($handle); ?> This code establishes the connection with the receipt printer through PRN, writes to the receipt printer through the file handle, and then disconnects the printer after printing your document....

Using the song editing capability in iTunes, you can transform any song into a personal ringtone for your iPhone. All you have to do is create a copy of your favorite track and then tweak it a bit to make it into a ringtone your iPhone can use. Ringtones have to be 30 seconds or less, so you’ll have to pick which part of the song you want to use....

AOL restricts emails to a maximum size of 25MB, inclusive of the message text and any attached files. Attachments that force the email to exceed this limit cannot be delivered, but correctly sized attachments are available for download within the email. AOL does not offer the option to open attachments directly in the AOL window, but Internet Explorer and Mozilla Firefox both support opening AOL attachments for viewing with a selected application without permanently downloading the file first....

If you’ve got a mono amplifier, you’ve got a great opportunity to really bring on the bass. Mono amplifiers are especially well-suited to wiring to two subwoofers. To wire two subwoofers to a mono amplifier, you need only know how to cut wire, use very simple tools and follow basic instructions.

Resistors are an essential component in electronic circuits that provide controlled impedance to the voltage and current running through the circuit. Resistors can be wired in two different ways within a circuit: series or parallel. Both options have their own specific benefits and uses, and it is essential that the correct wiring option is selected for your circuit as the resistors behave differently in each configuration. Tips Warnings Writer Bio

Using Multiple Text Boxes Insert a Text Box Click the Insert menu and then the Draw Text Box icon. Drag the cursor where you want the text box to appear. If you place the text box along the page margins, Publisher automatically snaps the text box to align with the page margins. This may look strange the first time it happens, since the text box lines will actually overlap the page margins a bit....

The “JComboBox” in Netbeans displays a list of items for users. The user chooses one of the items in the combo box that submits to your processing form. Netbeans has a graphical interface with a toolbox, so you only need to drag and drop a JComboBox from the toolbox and add the items you want to display without manually creating the code. jcombobox1.addItem(“Blue”); jcombobox1.addItem(“Orance”); Writer Bio

I/O Magic produces a line of CD and DVD drives that are compatible with computers running the Windows operating system. With an I/O Magic rewritable drive, you can burn media files and other content onto a blank CD or DVD. If you experience a problem while setting up or using an I/O Magic drive, there are a variety of troubleshooting steps to follow. Writer Bio

Ematic MP3 players, more basic than higher-end MP3 players that are capable of playing games and storing thousands of songs, are a popular alternative for those on a budget. Models are capable of holding as low as 2 gigabytes of MP3 songs and videos all the way up to 8 gigabytes, with newer models like the E4 even featuring a camcorder. These players are also very easy to use and load on your pc....

GIMP is free open-source graphics editing software and is not inherently unsafe. It is not a virus or malware. You can download GIMP from a variety of online sources. Like all software downloaded from the internet, you should exercise standard security procedures. A third party, for example, could insert a virus or malware into the installation package and present it as a safe download. While virus detection software will help prevent this kind of attack, there are ways to minimize your risk....

Long Lost Messages The “Ask” feature is probably the easiest way to send messages and communicate with other users on Tumblr. When you have new messages, they appear at the top of your Dashboard as a number next to the envelope icon. When you click the icon, it takes you to your message inbox where you can view all of your messages. This is about as far as the features of messaging go on Tumblr, though....