Unlocked phone

Last time i travel Philippines i brought 3 cellphones for my siblings. For some reasons they were not able to use them because it needs to be unlocked. I took them to the technician to have it fix but the labor price is too high. Few months later i decided to buy another cellphone online for myself. It was unlocked phone. The good thing about it is, I was be able to put any kind of simcard in it. Whenever i visited to another country, I can also put local simcard and it worked great.