If you want them to able to reply back to you without disclosing your cell number, one option is to send the SMS via AIM (if you're in the US). You can just use the ten digit phone number in this format:
+1234567890
For any US/CAN phone number, as the "buddy" in AIM, and then they'll get it as SMS with the ability to respond to it.
If you're trying to pretend to be someone else so that you can send an SMS that seems like it's them, and then have someone else get really angry and send an SMS back to the person you were pretending to be... don't be that guy.
Yes, it exposes your AIM s/n....
So now I'm pretty much assuming you're up to no good...
AFAIK, think about it this way: if you somehow send a fake phone number to someone via SMS, there's certainly no way they can respond back to you, because the only place that the fake number is associated with your real number is in your phone in the spoofing app. So when they respond to the SMS, it will go back to the fake number and not you.
And again, besides being jackassery, if there's a real person on the other end of the "fake" number, you're quite possibly committing telecommunications fraud or some other prosecutable crime.
so this AIM sms text is pretty much like same as text by email..
do i have to put the carrrie at the end of the number? like +1234567890@vtext.com ect..
265-060
yourscreenname: (using AOL IM)
your text message
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No -- that's a big advantage -- you don't even have to know the carrier. It works for all US/CAN devices capable of receiving SMS. You just enter the phone number with the +1 as the contact. On the phone, it looks like this:
Where the "265-060" appears as the phone number.