AutoSMS Send free SMS text messages w/o registration
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"AutoSMS" allows you to send SMS text messages for free, without requiring any registration. There are generally no or minimal limits on the number of messages you can send.


  1. What is AutoSMS?

    Built against the free & cool AutoSMS API, this extension allows you to send SMS text messages for free, without requiring any registration. There are generally no or minimal limits on the number of messages you can send.

    SMS support limited to carriers (of recipient) listed in the extension. If no carriers listed, SMS service may be down.

    Unfortunately, this service doesn't offer option to supply a reply number or address for recipient to reply to. But you can put that inside the SMS message if needed.

    For more details, visit

    This extension was created because the service provider didn't offer one, only offering a Firefox extension. Hey, other browsers are cool too! And this is our way of showing support.

  2. Why is there a list of phone service providers/carriers? And why do I need to select it for the recipient's carrier to send him/her a message?

    Likely because the AutoSMS service needs to pass your message to the SMS gateway of the recipient carrier for your recipient to receive it. Similar to sending an email to someone, you need to specify the domain or hosting provider of the recipient like or We've been spoiled by not having to do that for SMS messages.

    Think of it this way, basically, you pay (as part of your phone service plan) to send SMS to recipient from your phone. The plan provider receives your SMS to recipient's phone number and does a lookup via some directory/algorithm, etc. to find out which phone carrier the recipient is on based on the phone number and then passes it to the SMS gateway of the recipient's carrier. Unfortunately, I believe that lookup process isn't really available for free, hence free services like AutoSMS probably resort to alternate options. For example, you can find a carrier's email-to-SMS gateway so that you can send SMS to recipient from your email account, see wikipedia pages. You just need to know the gateway (meaning you need to know the carrier) So of course there's a catch when things are free (i.e. just a little more work to send a message).

  3. Why do I need to enter a CAPTCHA code?

    To prevent spammers, bots, and automation etc. to easily send out spam messages to many people (abuse prevention).

  4. Why is there no option to provide a sender/return phone number or email address?

    Ask the (API) service provider, but part of the name of the service at least for Android is anonytext, hence I guess it's supposed to be "anonymous". You can however, add your contact info as part of the SMS text message as a workaround.

    The clients we build are limited/restricted to the API functionality offered by the SMS service provider that I'm using for these clients.

  5. Why does the service return message saying that I need to enter the code correctly when I know I did, and thus it won't send out my message?

    This is a limitation of the (API) service provider. It does not distinguish when a code is entered incorrectly or there's some other problem.

    For example, the API service requires session state / cookie support, so if you build a client that doesn't offer that, it will fail with this particular error message quirk. Such is the case of using the Microsoft HTA version of the client on a computer with IE 6 or older, not with IE7 or newer. Seems lately, such may also be the case for Safari extension (issue 2 in the issue/bug tracker).

  6. How can I uninstall/disable AutoSMS from my Chrome/Opera browser?

    For the instruction please check

  7. How can I uninstall/disable AutoSMS from my Safari browser?

    For the instruction please check

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