For example, it is possible to make voice call over data connection. This allows making secure calls. The voice is being coded with VoIP Codec, encrypted and transmitted via Data call. Such calls can not be captured and overheard by anybody. Such technology is used in our Secure Voice product. But you can use the data call security also for transmitting any other data from or to your mobile, and the data can be encrypted. For UMTS Networks the data call is not available. But in these networks the security of data can be made in another way. If interested - just ask us!
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Symbian Development
