Be aware of the specified price and conditions of the service offered if you wish to use SMS or MMS added-value services. Make sure you are not taking out a subscription without realising it. If in any doubt, it is better not to make use of the added-value service at all.
Make a note of the deactivation code if you take out a subscription for receiving SMSs or MMSs, even though the deactivation code must be sent with each message. If you do not receive a deactivation code, contact your mobile telephony operator's hotline. On the basis of the short number, they can then inform you who operates the SMS/MMS service and provide assistance in relation to the deactivation code.
Be aware! If you are requested to send an SMS to a short number, especially if there is an assertion of urgency or the promise of a prize, only do so with caution, if at all. Claims that such services are free are usually untrue.
Be aware of who is using your mobile phone.
Exercise caution regarding to whom and where you give out your mobile phone number.
Activate barring sets: your mobile telephony operator must make these available to you.
