My mother (in her 70s) has a flip phone but no experience with a smartphone. She would like an iPhone, but probably wouldn't use it much. Basically wants it for emergencies and occasionally using Whatsapp to talk to relatives in Italy, and maybe Facetime. Would an iPhone 5 (maybe a refurbished purchased on Amazon or eBay) be an okay choice? She doesn't want to spend much if it could be helped. Thanks.