Raul bought an unlocked Samsung Galaxy Note 5 to be ready for a trip in Japan. Leo says that's a good idea because if he had waited until he got to Japan, he would likely not be able to use it here in the States because of differences with the radio frequencies in each country. Raul should make sure he gets a local SIM so he can pay Japanese rates for data, rather than pay international data roaming, which could be in the thousands. In fact, he should turn off the option that allows him to roam with data. Raul should check out PrepaidwithData.wikia.com for what SIM card to buy in Japan.