Hi Cangie,
Thanks for ur advice. I checked 3 mobile shops near my place, 1 shop charge $5 and 2 shops charge $3 for cutting the SIM card. I chose one of the $3 one, he didnt do a good job, some gold part of the SIM is being cut off, luckily the card still can be connected to my Telco. But I wonder whether I will experience intermitten connection problem, will need to monitor. Although changing over to a micro sim card is expensive, it is best for the phone, at least u don't need to worry abt connection problem.