Tethering allows you to connect another iPhone to the Internet if you have exceeded your monthly allowance of bandwidth, a friend allows you to use her data plan to avoid roaming charges or only one iPhone supports unlimited data. This can be helpful when visiting friends in different states or even different countries and can dramatically reduce the cost of your bill. Regardless of the reason for tethering two iPhones, you must first use a plan that allows you to use one of your iPhones as a personal hot spot. Tips Warnings Writer Bio
