Ron has a Samsung Galaxy S3 and it suddenly stopped reading SD cards. Ron cleaned the contacts on the cards, and now it can't be read. Leo says it could be the dialectic grease that he applied to it. Since the SD cards will be read by his computer, he can at least get the data off of them. Then he can either just use the internal storage on the phone, or he could look into a new phone. Leo says that phones age even faster than computers. It's as if they age 30 years every 1 year. That Galaxy S3 is now almost 4 years old, so it would make sense that it's starting to fail.
Joe has five late model Motorola Droid phones with Verizon, but he wants to change carriers. Leo says that Motorola Droids only work on Verizon. If he unlocks them, he could take them over to Sprint, and maybe AT&T or T-Mobile if the frequencies are supported. He'll have to get the SIM slot unlocked. He should tell them he's going overseas and needs it unlocked to get a local SIM. PadreSJ says a DROID MAXX can support an AT&T SIM Card, so if he has a friend who has one, he could try it.
Samuel is coming to the States next year and he needs a recommendation for a smartphone and carrier. Leo says that T-Mobile may be his best bet because it's GSM. AT&T is another option, but Leo prefers TMobile. He'll need an unlocked phone, then it's just a matter of buying a SIM.