I want to send a SMS text message to a cell phone from my computer but it says the cell phone user is not logged in and it says error 602

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How SMS Works - HowStuffWorks

computer.howstuffworks.com/e-mail-messaging/sms.htm

Oct 14, 2005 - Find out how SMS works and learn about the advantages of text ... If you have read How Cell Phones Work, you can actually see what is ...

How to Send a Text Message - Lifehacker

lifehacker.com/5821438/how-to-send-a-text-message

LifehackerJul 15, 2011 - Check your cell phone plan to see how much text messaging or textingcosts. If you don't have a plan that includes texting, each message you ...

How To Send Text Messages By Cell Phone ' News ...

www.channel3000.com/news/...Text...Cell-Phone/8334818

WISC?TVFeb 28, 2009 - Short Message Service (SMS) is often referred to as "texting" or sending text messages and it's growing in popularity among cell phone users ...

Free Text Messaging - Send Free Text Messages to Any ...

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Send Free Text Messages. Send SMS Text from PC to cell phone or mobile device.Cell Phone Provider Lookup! Stop Paying For Texting!‎Cell Phone Provider Lookup ... - ‎Terms of Service - ‎Block Free SMS Text ... - ‎Faq

SMS stands for short message service. Simply put, it is a method of communication that sends text between cell phones, or from a PC or handheld to a cell phone. The "short" part refers to the maximum size of the text messages: 160 characters (letters, numbers or symbols in the Latin alphabet). For other alphabets, such as Chinese, the maximum SMS size is 70 characters.
From
http://computer.howstuffworks.com/e-mail-messaging/sms.htm

TracFone International Texting Revoked

• Certain mobile phone upgrades affect the ability of TracFone customers to send text messages internationally. Some of the phones identified to have had this SMS issue are the LG290C, LG420G and Samsung T301G. The problem is present when an error message appears on your TracFone device after you send a text message to an international number that says, "Check SMS Restrictions."
  

Read more : http://www.ehow.com/info_8634048_trac-phone-problems.html Did you upgrade from the 420G to 440G? Certain mobile phone upgrades affect the ability of TracFone customers to send text messages internationally. Some of the phones identified to have had this SMS issue are the LG290C, LG420G and the Samsung T301G. The problem is present when an error message appears on your TracFone device after you send a text message to am international number that says, "Check SMS Restrictions"
Or your phone isn't capable of texting internationally.If it's supposed to then you need to call Tracfone customer service and tell them.

this is not really a problem but understanding should be clear:
Multimedia Messaging Service(MMS)

MMS is a descendant of SMS (Short Messaging Service). MMS extends text messaging to include longer text, graphics, photos, audio clips, video clips, or any combination of the above, within certain size limits.

MMS is frequently used to send photos and videos from camera phones to other MMS phones or email accounts. Most camera phones have MMS, but many non-camera phones have it as well.
if it has a photo, video or audio it will automatically be categorize as MMS
While SMS stands for short message service. SMS is also often referred to as texting, sending text messages or text messaging. The service allows for short text messages to be sent from one cell phone to another cell phone or from the Web to another cell phone. purely text:
just leave a comment if you have additional queries...
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Roger

i are already hearing about some problems on the device, with users complaining that there is an SMS bug preventing them from sending messages effectively.hoping that would be a bug fixing on the next firmware update.

You are above the maximum number of receipients. Try sending in batches of 5.

Best of luck

tmuncey hello,

Sometimes because of a phone bug or a SIM error, the "Service Centre" for SMS messages is changed.
Please call your cellular Service Provider, and ask for their SMS Service Centre settings.
Then, go to Messages > Settings > Text Message > Service Centre.
Make sure the number you were given by the Service Provider matches the one written there.
If not, please changed to the one given to you by the Service Provider.