If you need to know the phone number of a Sun Cellular SIM card, dial *99# from your phone and it will respond with the phone number. Thanks to suncelltweets for replying. The phone number can be stored in the SIM card and some phones are able to display that. For Globe on a Blackberry, it displayed Unknown number when you press the green phone key. I also tried this on Smart but it did not work. This seems like an operator specific feature and Sun has been able to provide that.
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