Yes, to use BasicTalk service, you need broadband Internet service from a third-party Internet Service Provider. BasicTalk works with any high-speed Internet service (such as DSL or cable) with a minimum speed of 30kbps.
Yes, this requires internet service.
No. This device is the same as a Cell phone. It uses only cell towers same as cell phone does. It is charged by an adapter, but you can get a 12 volt dc to 110 volt ac to plug into your cigarette lighter socket and then plug in a regular pstn telephone into the device or use a cordless phone, which must be plugged into the inverter as well, however the cordless phone charger must be charged as well. If you use a pstn telephone, the only thing that needs charged is the Straight Talk device. Even if it is charged, you can use it as a cell phone for short trips w/o charging. Excellent device. Use it in your home, then put it in your vehicle when traveling.