Jude wants to get a tablet and LTE access. Leo says she should get a tablet with LTE and buy an iPad from Apple. Android tablets are an option, but they're not nearly as good, or as elegant to use as the iPad.
How can she use it hands-free in her truck? She should make sure Bluetooth is turned on, and she can enable "Hey Siri". If she doesn't want her phone to respond to that command, then she should put it face down. Then just her iPad will answer to "Hey Siri".