I will buy this incredible mobile phone in australia GSM 900, and I am taking it to Chile GSM 1900 they run on gsm both countries and the phone is triband, so this telephones need to be un locked ?? for what ?? and How you unlock a phone?? the australian operator has to do this ??wht if he doesn´t??
You only need to unlock a phone if you are trying to switch providers. You are just switching bands which doesn't require doing more than just getting off the plane and turning it on.
but I am swithching providers, I won´t use the original SIM card, the original Operator Is Optus, and the new one Entel PCS, so .......................
It may be locked, but to tell if it's locked, you'll have to put another provider's SIM in it. If it says it won't accept it, then you know it's locked. I may be able to unlock it, but I will need the IMEI # to know for sure.
