How it works - Self-serve mobile advertising

udefn is a SMS service that allows mobile users to easily interact with various bots. For regular use, udefn does not charge mobile users and bot publishers get paid for every query response.

udefn reserves 1/2 the space on each message for in-line advertising. You can bid on specific keywords, location, mobile carrier to place your ad teaser. You only pay when your ad teaser is inserted.

You can optionally setup up full ad response messages also. When a particular ad campaign has full ad response message setup, user is sent instructions in the same message on how to get more information on specific ad or offer. If the user who receives the message is interested in the ad teaser, they can request more information. There is a small fee for full ad message response. Please refer to Plan & Pricing for current fees.

udefn never sends unsolicited messages or advertisements - all outgoing messages are initiated by prior user requests and ads are appended to existing traffic.

Standard Messaging Rates Apply. Other charges may apply. Visit your carrier for more information. To unsubscribe, text stop to 51406. Text help to 51406 to learn more about udefn.

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