three messages from the same telemarketer trying to sell a sports trivia game.  they are from AT&T apparently targeting tracfone users?

I want to unsubscribe to this service

Unsubscribe From This Service

who is texting me from this number/
z8h7

I send STOP and I'am still getting MEDIA NET ALERT. I do not wise to hve them sent to my phone. It has been goig on for months know STOP!!!!!!

I got this spam, also. I use Net10. "MEdia Net HDTV Alert: Play Father's Trivia 6/20-21 for a chance to win...blah, blah, blah...click http://go.now...etc,etc...."

Really annoyed by all the spam texts that I still have to pay for.

march madness trivia 3/20-22 for a chance to win a 73"
HDTV! click http://go.now or go2 MEdia Net NOW 2 PLAY

Don't bother calling att wireless for help.  Here's a blog I found on another website that might help....

Upon further investigation, it looks like the phone number 101010xxxx is generated by AT&T anytime an email is sent to a xxxxxxxxxx@txt.att.net address.  I think this is done so that "Reply" with a message works.  Each time you receive another email to your .txt.att.net address, the fake "phone number" is incremented.  It's simply a key that is used to look up the actual email address of the sender when you reply.

So, I send an email to a phone.  Let's say my email address (the sender) is user@example.com and the recipient is 1234567890@txt.att.net.  Since it's a txt.att.net address, the email is routed to an AT&T email server for delivery.  

There, the destination phone number (1234567890) is looked up in a database where the next available fake sender phone number is retrieved and assigned to the email (let's say it's 1010100003, indicating that the phone 1234567890 has already received a couple of emails as text messages, and 1010100001 and 1010100002 have already been used as a result).  At the same time, the actual sender address on the email is saved in the database with the fake sender phone number as a key so it can be retrieved later if a reply is processed.

Now, AT&T takes the email message and repackages it as an SMS text message with the fake phone number as the sender and fires it off to your phone.  When it arrives you see this fake sender (1010100003), as well as the FRM: field (which is populated with the actual sender's name--although it's just for show and there's nothing you can do with it).

If you wish, you can reply to this message.  But your reply is sent to 1010100003, which ends up back on an AT&T server.  There, they look up 1234567890 in their database, and retrieve the actual email address of the original sender (again, using 1010100003 as the key), repackage the SMS as an email message and fire it off to the original sender.

You can easily try this out by sending yourself an email to your .txt.att.net number, then replying to the SMS you receive as a result.  Each time you do this, the fake phone number is incremented, since it's a unique key (relative to your phone number) in their database.

This is an educated guess at what is actually going on with these "phone numbers"--they're just keys generated automatically by AT&T so they can use it to look up the original sender's actual email address when you respond with a text message.  You have no way of finding out the sender's email address unless AT&T tells you who 1010100003 really is--because they're the only one that knows.

I continue to receive text messages from 111-050-9357 even though I've  sent numerous text messages back to opt out. I'm filling out an FCC complaint form: https://esupport.fcc.gov/form1088/1088gform.do  It's time-consuming and a real pain. I think these stooopid text messages are trying to send us to: http://gameinvasion.comcast.net/gameinvasion/ but I'm not certain.

I get a text message to my inbox everyday, at the same time, tried to reply and nothing, called att, and they gave me a website that no longer exists..HELP

MEdia Net Alert: Play 2007 Trivia 12/31-1/1 for you chance to WIN 1 of 10 Xbox 360 Elites!  Click http://go.now or go2 MEdiaNet NOW 2 PLAY! Reply stop 2end msgs

Okay I was having this same problem until today.  I called AT&T wireless (Cingular) and told them about this MediaNet garbage.  They said I had somehow been subscribed to a $.99 per month thing that allowed for MediaNet to send me these "deals".  They unsubscribed me and said I should get no further messages from these people but to call back if I do.  

I hope this information helps others and I hope I get no more spam from MediaNet...

Additional Information on 111-050-9357
http://go.now resolves to http://pyr.cingularpromo.com/enter.cfm
Whois search results in Network Solutions Private Registration:
       Smith, Jason
      gd7br6nt8u5@networksolutionsprivateregistration.com
      ATTN: CINGULARPROMO.COM

Worth a try: Customer Opt Out Request Form
http://www.wireless.att.com/privacy/customer-opt-out.jsp

Unwanted spam text messages. The web site they direct you to, http://go.now is not a valid URL. Opt-out is ignored. Called AT&T and they will not do anything about it. My phone is on no call list. have files complaint with FCC 07-T00057680.

getting spam txt messages from this number.  they have an option to opt out, but not only have they ignored my opt out txt messages, they reply to them with more spam.  I can see my message listed under their new spam saying stop with the spam already.

Sending unwanted Text Messages

MediaNET alerts from some apparently third-party company sent to Cingular/AT&T cellular phones that support the MediaNET service.  Cingular/AT&T takes no direct action on these messages which are seemingly impossible to opt out of.