Options:
- pay full retail price
- change to share everything plan
- provide own equipment (e.g. buy on eBay)
- keep grandfathered plan but add metered data plan (e.g. 2GB/$30)
- phantom line or switcheroo upgrade scheme (i.e. add new line, buy iPhone 5 with metered data package, switch new line ESN to old flip phone, remove metered data package, switch original line ESN to new iPhone 5)