Cellular Optimization / Cellular Cost Management Services.

This basic Android smartphone sports 3G data, touch screen, and 2-megapixel camera. Other features include video capture, GPS navigation, memory card slot, and 3.5mm audio jack.

This alternate version of the Droid RAZR sports a much larger battery. This Android phone with 4G LTE also sports a large qHD screen, 1.2 GHz dual-core processor, front-facing camera, 8-megapixel main camera, 1080p HD video capture, and support for PC-like dock accessories.

This close cousin of the Conquer 4G swaps WiMAX for LTE, but is otherwise similar. Key features of this affordable 4G phone include a 1 GHz processor, front camera for video chat, memory card slot, and Wi-Fi.

This CDMA version of the Optimus Black sports a sleek design, light weight, and bright, extra-long display. Other notable features include a 5-megapixel main camera, 2-megapixel front camera, DLNA wireless media streaming, Wi-Fi mobile hotspot, and a memory card slot.

Pantech's first 4G LTE phone for AT&T sports an affordable price and a compact frame with 4-inch display. Key features include 5-megapixel camera, memory card slot, and 1.2 GHz dual-core processor.

Pantech's first 4G LTE phone for AT&T sports an affordable price and a compact frame with 4-inch display. Key features include 5-megapixel camera, memory card slot, and 1.2 GHz dual-core processor.

This close cousin of the Conquer 4G swaps WiMAX for LTE, but is otherwise similar. Key features of this affordable 4G phone include a 1 GHz processor, front camera for video chat, memory card slot, and Wi-Fi.

Sony's first 4G LTE phone sports a large true HD display and a unique design with a curved metal back. Other features include a 12-megapixel camera with Exmor R sensor, front camera, TV output, dual-core 1.5 Ghz processor, and memory card slot.

This update to the Droid 3 add 4G LTE data, while shaving off some weight and thickness. Other features are similar, including a qHD display, 8-megapixel camera, front-facing camera, and slide-out five-row QWERTY keyboard. Other features of this Android phone include 3.5mm audio jack and up to 48 GB of memory.

This alternate version of the Droid RAZR sports a much larger battery. This Android phone with 4G LTE also sports a large qHD screen, 1.2 GHz dual-core processor, front-facing camera, 8-megapixel main camera, 1080p HD video capture, and support for PC-like dock accessories.

Pantech's first 4G LTE phone for AT&T sports an affordable price and a compact frame with 4-inch display. Key features include 5-megapixel camera, memory card slot, and 1.2 GHz dual-core processor.

This close cousin of the Conquer 4G swaps WiMAX for LTE, but is otherwise similar. Key features of this affordable 4G phone include a 1 GHz processor, front camera for video chat, memory card slot, and Wi-Fi.

Sony's first 4G LTE phone sports a large true HD display and a unique design with a curved metal back. Other features include a 12-megapixel camera with Exmor R sensor, front camera, TV output, dual-core 1.5 Ghz processor, and memory card slot.

This update to the Droid 3 add 4G LTE data, while shaving off some weight and thickness. Other features are similar, including a qHD display, 8-megapixel camera, front-facing camera, and slide-out five-row QWERTY keyboard. Other features of this Android phone include 3.5mm audio jack and up to 48 GB of memory.

This alternate version of the Droid RAZR sports a much larger battery. This Android phone with 4G LTE also sports a large qHD screen, 1.2 GHz dual-core processor, front-facing camera, 8-megapixel main camera, 1080p HD video capture, and support for PC-like dock accessories.

This flagship Windows Phone sports 4G LTE data and a large 4.3-inch ClearBlack OLED display. Other features include 8-megapixel camera with HD video capture, front camera, XBox Live gaming, Zune music player, multi-touch screen, and Wi-Fi.

This update to the Titan sports an industry-leading 16-megapixel camera, and adds 4G LTE data. Other features are similar, including a large 4.7-inch display, 1.5 GHz processor, XBox Live gaming, Zune music player, and Wi-Fi.

This basic Android smartphone sports 3G data, touch screen, and 2-megapixel camera. Other features include video capture, GPS navigation, memory card slot, and 3.5mm audio jack.

This alternate version of the Droid RAZR sports a much larger battery. This Android phone with 4G LTE also sports a large qHD screen, 1.2 GHz dual-core processor, front-facing camera, 8-megapixel main camera, 1080p HD video capture, and support for PC-like dock accessories.

This close cousin of the Conquer 4G swaps WiMAX for LTE, but is otherwise similar. Key features of this affordable 4G phone include a 1 GHz processor, front camera for video chat, memory card slot, and Wi-Fi.

This CDMA version of the Optimus Black sports a sleek design, light weight, and bright, extra-long display. Other notable features include a 5-megapixel main camera, 2-megapixel front camera, DLNA wireless media streaming, Wi-Fi mobile hotspot, and a memory card slot.

Pantech's first 4G LTE phone for AT&T sports an affordable price and a compact frame with 4-inch display. Key features include 5-megapixel camera, memory card slot, and 1.2 GHz dual-core processor.

This follow-up to the Revolution sports a larger, true HD display, faster processor, and better camera with 1080p HD video capture, all in a thinner, lighter body. Other key features include 4G LTE data, front camera, mobile Wi-Fi hotspot, HDMI TV output, DLNA wireless media streaming, and a memory card slot.

This close cousin of the 9350 adds GSM world roaming, but is otherwise identical. The new Curve series is thinner, while upgrading the display and camera, and adding NFC (carrier-dependent.) Other features include text keyboard, full web browser, Wi-Fi, 3.5mm headphone jack, and memory card slot.