Mobile phones are today used mainly for
communication purposes: i.e. making phone calls or
sending SMS messages. But, new high—end phones
are already introducing new mobile services where
mobile phones are used not only as communication,
but also as information distribution and sometimes
even as computing devices. For low–end phones
current trends are to provide new mobile services,
mostly based on background servers and simple
communications using SMS or USSD messages. For
smart phones and phones with memory cards
additional functions are implemented and distributed
as software applications stored in the memory cards
of mobile phones. So, one important trend in mobile
networks is to provide new, additional mobile
services using applications stored in the memory of
mobile phones.
Another