Posted by Fox on June 27, 2007 at 5:09 PM
In this, the first of a series of articles on SMS text spam, I cover what SMS Text Spam is, and how the SMS text spammers got your mobile number of cell number in the first place..
My Definition of SMS Text Spam is straight forward: A disruptive, unwanted, commercial SMS text message sent to a mobile phone or cell phone.
Unfortunately there are far too many ways to have you number appear on an SMS text spammers database, but essentially it's either you gave your number out
1. Buying Mobile Content
When buying a ring tone, a mobile game or other mobile entertainment, the terms and conditions of the service provider often include a clause that gives the provider permission to send you SMS text advertising messages. Though technically this isn't SMS text spam, its no less irritating. This clause is often referred to as opt-in, meaning that you can opt-out of receiving SMS text messages from the provider.
2. Downloading Free Mobile Content
This differs slightly to 'Buying Mobile Content' in that the provider often gives you no option to opt-out from receiving the SMS text spam. They're of the opinion that they're giving you a free ring tone, free mobile game or other such mobile content, in exchange to your agreeing to receive their SMS text messages.
3. Using a Free SMS Text Service
Be in no doubt that ALL of the free SMS text service providers collect mobile numbers. What matters is what they plan to do with it once they have it.
It's worth noting at this point that ALL SMS text messages sent to a mobile phone or cell phone have a cost, and although some free sms text providers can get that cost down to fractions of a penny, it is still a cost that they incur.
The reputable free SMS providers will go to great lengths to protect your personal data and NOT disclose your number to ANY third parties. They will however happily send you an SMS text advertising message on behalf of a third party. They will charge a fee to the business wanting to advertise to you., it's how they generate a profit and they make this very clear in their terms and conditions. It's an acceptable trade off.
The less reputable free sms providers operate with less care for your personal data, and although they're terms and conditions include a clause to send you SMS text advertising, they may send an excessive number of messages, or even sell their database of mobile numbers to third parties.
4. Someone else used a Free SMS Text Service
The same less reputable Free SMS providers will collect the mobile numbers of recipients. For example, a friend used a free SMS service to send you a text, you're number will have been stored for use as they see fit.
5. Pure Speculation
This is probably the easiest method an SMS text spammer can use to collect mobile numbers. They simply speculate. If mobile number 099912345678 has been issued by an operator or network, then it's very, very likely that the 09991234566 and 099912345679 have also been issued at some point.
Having collected a number of known numbers, the spammer can use a simple program to generate a list of other likely numbers.
Related : Data protection isn't enough to save mobile advertising