Most people use more than one email address, often split between business and personal use. It also makes sense to have two phone numbers, for the same split purposes. There are many options for how to do this exactly. Some can be had for free, depending on your requirements and features you need.
None of these will require additional hardware over the phone itself, although some may require the use of an app or even access to a website in order to function. T-Mobile even offers the DIGITS program that lets you add up to five numbers to one phone or tablet, direct from your carrier.
