HTC has just announced a new line of 4G smartphones — the ThunderBolt will come out on Verizon, the Evo Shift on Sprint and the Inspire on AT&T.

With these new arrivals, HTC’s portfolio of 4G devices has grown to six total, including the original Evo, the G2 and the MyTouch.

We were lucky enough to grab side-by-side pics of all three devices at CES today.

The Evo Shift, HTC’s newest Sprint device, features a slide-out QWERTY keyboard, a 5MP rear-facing camera and a low $149 price point that’s sure to attract would-be first-time smartphone buyers. The device has a relatively small, 3.6-inch display and no front-facing camera.

The HTC/Verizon ThunderBolt comes with deeply integrated Skype () technology and is part of Verizon’s all-new 4G LTE connectivity plans. This device also features an 8MP camera and a 4.3-inch display.

The Inspire, which HTC is partnering with AT&T to bring to market, features a large, 4.3-inch screen, as well as some new advances in HTC’s Sense technology, including an online component that will allow users to locate lost phones or wipe a phone’s data from a website.

All three devices will ship with Android () 2.2, a.k.a. Froyo; however, release dates for all phones aren’t yet available.