Well, I can tell you from personal work experience over 3 years with a cell phone company that sending messages through email to a
[email protected] o m would be a very bad idea, because most likely it's receiving through the MMS protocol, not SMS. Most people don't subscribe to MMS bundles, so basically, you'd end up costing each person you spammed X dollars per message. Sometimes $2.00 USD or so..
Believe me. Steer VERY clear from this method of contacting text "subscribers" What you need to make this 'acceptable' spam is to clear each number through the do not call registry (for US, at least) AND...
Text message from a true SMS terminal, whether you anonymously subscribe to a website that can send mass txt messages or know a
sales rep who works for a cellphone company. NOT A DEALER
IMO, I wouldn't do text message advertising because of the legalities on top of all the things I mentioned above. I would report you if I were charged for spam that was delivered to my MMS inbox; So at least make sure you're sending the messages through the correct protocol, and not just sending messages to some list of cellphone email submits that you bought from the net. lol
Each carrier delivers their sms differently..depends on the switch settings. Usually they'll post their
configurations on their websites to their customers, (www)account manager, or can be found in their FAQ section.
Bluetooth method, now I'd go for a cheaper solution than
www.*lue*litz.com (replace * with b). btw, I don't endorse them and am in no way affiliated. I just thought it was a cool idea to get it cheaper than what they're selling it for

Good luck. Questions, feel free to pm