Any handset can be a AAA emergency cell phone as long as you sign up for AAA service and enter their number into your handset’s phonebook. If you want dedicated roadside assistance integrated into the phone, you have a couple of options.
Consumer Cellular used to partner with AAA for roadside assistance, however they now use a service provided by AllState for $3 a month.
If you are an AARP member you will also get a discount on their phones, and they have a pretty good choice, ranging from the Motorola WX418 to a Motorola smartphone for $100. They also carry an especially easy to use Doro phone.
You can get a smartphone or flip phone from Lively (formerly GreatCall). Lively phones are really easy to use, and you can also get some great additional features such as live nursing advice for a small monthly fee. This can be an advantage if you prefer paying monthly for the service rather than a yearly fee.