The MMS transfer between the user and the MMSC is done by WAP/GPRS connection, for this purpose, the user terminals accept different definitions of WAP service profile. Thus, operators typically specify a profile for transmitting free WAP MMS, charging is performed by the MMSC and is not in the GPRS core network as handled by Call Tracker Reporting.
Consider that normally GPRS traffic has been used to connect to the Internet or mobile WAP network. Instead, GPRS traffic generated by multimedia messages is usually not charged, to send or to receive, since it is easier for users and operators to block their pricing. However, if the user is out of coverage area (roaming), you probably do have to pay a fee for data traffic, to connect to a different network, which can be detected by Call Tracker Reporting.
For this reason, you should disable the automatic reception of multimedia messages when roaming to avoid high costs. This configuration will be in the phone menu, without having to consult the operator to perform it.
When a user decides to send an MMS message, the submission process is as follows: The user gives orders as regards format and contents of the message in your terminal;
The terminal generates a “script” SMIL with the order to set content. The terminal is contacted with the MMSC through the GPRS core network using the WAP profile specified by the operator for this purpose.
The GPRS core network and MMSC contact the VLR to verify that you have permission to use the service. The message is transmitted to the home MMSC and thence to the operator’s MMSC destination.
Once the destination operator MMSC has received an MMS message, the process to the user’s terminal is as follows: The MMSC checks databases or the target user’s HLR if your terminal has multimedia capabilities. If the terminal can not receive MMS, SMSC is sent to the user a message with a key and Internet address in which to display the message.
If the terminal can receive MMS, SMSC is sent to the WAP Push message with basic information and the necessary message for download. If necessary, the MMSC message content is adapted to the characteristics of the user terminal. When active, the user terminal receives the SMS (normal text or WAP Push) notifying the reception;
In July 2004 launched the fourth-generation iPod. The biggest difference with the 3G is the use of the “Click Wheel”. The 4G was also smaller and cheaper than its predecessor. Apple claimed in the introduction that this new line of iPods were more sparing with energy (they would now have to work 12 hours).
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