As the usage of mobile phones grew, the unsolicited spam sms (and generally unwanted) commercial advertisements grew rapidly. This can be particularly annoying for the recipient, because unlike email, it is usually difficult or impossible to delete an SMS message without reading it.
In addition, some wireless service providers, notably in the USA, charge a fee for every message received, including spam, placing users in the unenviable position of having to pay to receive unwanted spam on their mobile phones.
Some telecommunications providers believe that SMS spam is going to be the next big challenge as the fast development of technology allows SMS spam to be sent at relatively low cost using Internet SMS portals.
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