The latest iphone rumors suggest Apple is planning a massive price hike for next year's Pro models, potentially adding $100 to $200 to the sticker price, while analysts warn that a new "lock down" battery replacement policy could force you to pay Apple directly instead of going to a third-party repair shop. That means your next smartphone upgrade might cost nearly as much as a month's rent, and even replacing a dead battery could cost as much as a tank of gas.