来电通 is the most popular software for incoming/outgoing call inquiry on Symbian smartphones currently. It can show number's place of origin intuitively when answering/making a call.
Apart from the functions of incoming/outgoing call query, 来电通 also has many humanized small functions such as incoming call filter, big head sticker for incoming/outgoing calls, communication record inquiry, call duration reminder, SMS reminder, area code query, mobile phone number query, IP telephone dialing, and customized prompt box display style, etc.