Crystal's daughter has gotten into gaming with Minecraft and she's at the point where she wants to do mods. She doesn't understand it, though. Leo says that some mods run on servers online, while some go on the computer (called Clients). A good option is Gary's Mod. Some of the mods she's interested in probably aren't able to work on her computer, though. Mods also tend to work on PCs. The version of Minecraft on Mac runs on Java. There's also an iPad version, but she wouldn't be able to merge them. The risk with a mod, though, is that it's third party.
Dave is looking for an Android phone mod that will protect him from being spied on. Leo says it's better to trust Google than some unknown person who may have built something into a Mod.
Monty got an HTC Thunderbolt and wants to know what the most recent Android is to breathe new life into it. Leo says that the oldest phones are the best candidates for new firmware and mods.