Question about RIM BlackBerry Curve 8310 Smartphone

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Get a red x and protocol error when trying to send a sms text

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  • engineer925 Jun 28, 2009

    I found my problem with this was that somehow the Service Center number got changed. This is for a BlackBerry Curve 8310 on AT&T.
    Went to AT&T wireless web site and got the proper number "SMS Message Center Numbers".
    On the phone, go to Options/SMS Text, move down to the Service Center line and put in the proper number remembering to put the + plus sign in front of it.
    So if you get a Protocol Error and a Red X when trying to send SMS text, check this item too.


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  • 81 Answers

Be sure that you are in an area that supports data. The device should show GPRS, EDGE or 3G on the top. You may need to remote the battery and replace it to reset it.

Posted on Jun 30, 2009

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How do I text?


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How can I tell if someone has read a message I sent them in my regular message box.


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TracFone International Texting Revoked
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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"
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I have a BlackBerry Pearl 8100, and every time I try to send a sms text message I get a Protocol Error


Hi, go to your wireless provider web site and got their proper number "SMS Message Center Numbers".
On the phone, go to Options/SMS Text, move down to the Service Center line and put in the proper number remembering to put the + plus sign in front of it. So if you get a Protocol Error and a Red X when trying to send SMS text, check this to fix it..

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tmuncey hello,

Sometimes because of a phone bug or a SIM error, the "Service Centre" for SMS messages is changed.
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