How to Unlock a T

1. Dial '611' on your phone and press 'Send' to contact T-Mobile customer service. Request your unlock code.
2. Power off the phone after obtaining the unlock code. Remove the old SIM card from your phone and insert a non-T-Mobile SIM card into the phone.
3. Enter the SIM card PIN if necessary on the phone keypad. Press 'OK.' If you do not remember your PIN, obtain it from customer service by dialing '611' on the device and pressing 'Send.'
4. Enter the unlock code when prompted. The device will unlock and the phone will connect to the network registered with the SIM.

How to Get Double Minutes With a Net10 Phone

1. Navigate to the Net10 purchase page or visit your local retail store. These are the most convenient places to acquire additional minutes for your Net10 phone.
2. Purchase a 30-day plan for your Net10 phone. The 30-day plans allow for either unlimited minutes for $50 a month or 750 minutes for $25 a month. With the regular plan, a $20 card will purchase only 200 minutes for 30 days of service. You will more than double the number of minutes using a revolving 30-day plan for your Net10 phone.
3. Enter your Net10 phone number or phone serial number and make your purchase. This will add the new plan to your phone, more than doubling the number of minutes you would have normally.

How to send SMS Email Messages to Straight Talk Phones

1. Determine the cell phone service provider that is servicing the Straight Talk customer you're sending the email message to. Whether it's Verizon, AT&T or any other service provider, all you have to do is take the 10-digit phone number and go to FoneFinder (FoneFinder.net). Once you're there, insert the area code and phone number in the space provided and click 'Search by Number.' FoneFinder will provide you with the name of the network that services the 10-digit wireless number.
2. Learn the network provider's SMS format. Each cell phone network provider has its own format for sending email messages to wireless phones. The format is usually in the @service.provider.com format. For an extensive listing of all cell phone providers' e-mail formats, visit AboutPrepaidCellPhones.com for an alphabetical list of SMS addresses by cell phone service provider. (See Resources.)
3. Insert the phone number and network provider's email address format. Once you have the appropriate format, all you need to do is type in the phone number of the Straight Talk customer you're sending the email to, followed by the appropriate network provider's address. It would look something like this if your Straight Talk recipient were on the Verizon network: 2323533456@vtext.com
4. Send the SMS email message. Make sure to keep the message to your Straight Talk recipient short. SMS stands for short message service and cannot consist of more than 160 characters. Although the newer phones have larger screens for reading messages, anything more than 160 characters will be truncated.

How to Change Your Prepaid Cingular Phone Number

1. Call AT&T Prepaid Customer Care at 800-901-9878 or dial 611 on your GoPhone. Enter your phone number at the prompt and wait for a prepaid service representative to speak with you.
2. Ask the representative to change your prepaid number. Tell him the reason why you want to change the number. If you are relocating, you may be eligible for a free phone-number change. Otherwise, there may be a fee of $18 as of October 2010.
3. Choose a phone number. Pick a similar phone number if it is available so it is easy for you to remember. Pay the fee if necessary, using a debit or credit card. The phone number will be changed while you are on the phone with the representative. You may have to power off the phone and power it back on again to see the change.

How to Track a Cell Phone Show the Exact Location

1. Obtain a cell phone with a GPS chip. Most newer cell phones, including the BlackBerry, Motorola iDEN, Boost Mobile, Windows Mobile and many others, already contain GPS chips.Some phones, especially older phones, do not have the chips installed. Find out from the manufacturer if the phone will take a GPS chip. If so, the chips can be bought at cell phone stores, from the manufacturer or over the Internet. Install according to the manufacturer's instructions.
2. Check with the cell phone service company to determine if its network has GPS capability. Most larger services, such as Verizon, Cingular/AT&T and Sprint/Nextel, provide the service. Disney Mobile is designed to allow child cell-phone tracking through GPS.
3. Find a location-based service, such as AccuTracking or uLocate.com, which often works with the cell phone service companies. Independent services such as Mologogo and others are also available. These services may charge small or moderate fees for GPS tracking.
4. Use the computer to go to the location-based service provider's website. Log in and follow instructions to subscribe and to download its software to the computer. Use the computer-phone cable to connect the cell phone to be tracked to the computer. Follow the instructions to load the GPS-tracking software from the computer into the cell phone, and, if necessary, to activate it using the phone's menu.
5. Give the phone to the user and use the computer to log onto the location-based service provider's tracking website. Depending on the service, it can show the phone's location on a Google or MapQuest grid. Some services can also tell at what speed the phone is traveling, how long it has been in one position and even the altitude. Some services will send a text message to another cell phone if the tracked phone leaves a pre-determined area.If the tracker has a cell phone with wireless Internet access, she may be able to use that instead of a PC to track the phone.

How to Send Free SMS of 140 Characters

1. Access a free online text messaging website. Txtdrop.com, Text4Free.net and Textem.net are examples of free sites that offer at least 140 characters in a text message.
2. Fill in the site's form with the message recipient's cell phone number and cell phone provider and the text message. Some of the websites may ask for your email address, but it is optional.
3. Press 'Send Message' when complete. A Web page will load stating that your message was sent.

How to Remove a Phone Number From Free Listings

1. Call your local telephone service provider's customer service line. Local telephone service providers compile residential telephone numbers and add them to their White Pages telephone directories.
2. Inform the customer service representative that you would like an unlisted telephone number. Find out whether it is possible to change your current number to an unlisted one. Keep in mind, though, there is no way to remove your phone number from existing printed and released directories.
3. Order a new unlisted phone number from your telephone provider's customer service representative. Do this if you want to ensure that your telephone number never makes it onto a White Pages listing. Skip this step if you do not mind your phone number existing in previous listings.
4. Search for your phone number on Google's online free listing. Enter your telephone number in the Google search bar (see Resources). Click the 'Phonebook Results' link containing your telephone number and personal information. Click the 'Request to Have Your Name Removed From This List' link on the ensuing Web page. Complete the ensuing form.