I have a relative who is about to buy a IPhone 6s plus, and a plan. She wants to eventually own the phone, but will consider other options. She doesn't have g

I have a relative who is about to buy a IPhone 6s plus, and a plan. She wants to eventually own the phone, but will consider other options. She doesn't have great credit--one of the companies wanted her to put down a $400 deposit.(she has bad credit, but always pays her bills. The companies actually make money off her with their late fees? My question is what is the best plan as of around 9-13-15? I am sick of looking at the plans, and the fine print. Plus-I'm out of the game. I bought a tracfone with a years worth of minutes. I can't get a good internet connection, but it's no big deal; I have an old iPhone I use to connect to public wifi when I'm out and about. I have no desire to sign up for a plan until my I start making more money. I told her if it was me, I would go through Republic wireless, but she's dead set on a new IPhone. Sorry, I know I'm being lazy for not doing my own research, but figured someone on this site might have a good recent recommendations? (Cell phone reception is not that important.)