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All Countries / Types of opt-in allowed in each country

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The following are a list of methods a user can opt-in to a premium SMS service. Country restrictions apply.

 

WO: Web Opt-in (not allowed in any countries)

WO-PIN: Web Opt-in via MT delivered PIN entered online.

SMS-O: SMS Based Opt-in

WO-RAR: Web Opt-in requiring an MO response.

WO-PFI: Web Opt-in PayforIT (UK only)

DO: SMS Based Double Opt-in

 

Find a description of each below:

 

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WO-PIN: Web Opt-in via MT delivered PIN entered online, also known as Pin Opt-in

1) User on website prompted to enter their phone number (and possibly select their network)

2) User receives a non-billed message (including all the regulatory instruction) to their phone with a unique password

3) User enters the password in on your site

4) User is opted in and receives the billing message

 

Via Premium SMS PhonepayPlus in the UK no longer allows this method as it is open to service provider abuse. e.g. there is no proof the user entered the pincode on the website after receiving it to their handset, however this method is allowed and widely adopted in the US.

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SMS-O: SMS Based Opt-in

1) User sees call to action and sends keyword to shortcode

2) User receives billed message

 

Good method approved universally as there is 100% proof to the carriers that the user sent in the MO.

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WO-RAR: Web Opt-in requiring an MO response

1) User on website prompted to enter their phone number

2) User receives the regulatory double opt-in message informing them (amongst other things) to reply back with Yes or another keyword

3) User receives the billed message

 

Good method approved universally as effectively is a double opt-in and easy for the user. Can also combine with an SMS based opt-in so after user has entered their number online and been sent the standard rate message, they are presented with the SMS Based Opt-in instructions. 

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WO-PFI: Web opt-in PayforIT (UK only)

1) User on website prompted to enter their phone number

2) User receives standard rate sms with a WAP link prompting them to visit the link

3) User clicks on the link and is billed

 

Relatively new method adopted in 2009 by all UK carriers in response to the problems caused by the previously allowed WO-Pin method.

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DO: SMS Based Double Opt-in

1) User sees Call To Action and sends a text message to the Short Code

2) User receives the regulatory double opt-in message informing them (amongst other things) to reply back with Yes or another keyword

3) User receives the billed message

 

See http://clients.txtnation.com/entries/105557-usa-double-opt-in-format for an example specific to USA.  

100% guaranteed no come back from the user as they are informed twice of the price, universally supported.

 

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There is another type of opt-in called MSISDN Billing also known as WAP Billing. This can be available in countries that support MSISDN forwarding. MSISDN forwarding is the term used to describe where a user is visiting a wap or web page from their mobile handset, the carrier passes through the MSISDN in the headers. Where allowed, upon having identified the MSISDN of the user, after informing and them agreeing to the price, you can deliver  a billed message. 

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