I'm looking for a simple cell phone for my aunt, but am clueless about them. A flip phone with big digits and no sign up sounds like it would be perfect for her. Something that comes with X minutes out of the box, no sign up, no credit cards, no contracts, etc. When searching the hundreds of models online the descriptions generally do not state what extra steps are needed to activate service. To get one that works right out of the box, is there a particular brand or phrase I should be searching?