I own a AT&T (Cingular) Wireless store and come across many customers who complain about phones or tell me they just love their phone.  I personally think every phone fits a different type of person.  Here are some of AT&T (Cingular) phones and some short remarks about each of them. 

Motorola V3 Razr - Nice looking, Fragile, Dust collects inside the screen.

Motorola L7 SLVR - Great looks!, Nice menu, Reception is not so great, speaker is low.

Nokia 6102 - Durable phone, okay camera, menu is not that good. FM Radio.

Nokia 6030 - Great starter phone, low volume, Speakerphone, vivid screen.

Samsung D807 - Great phone overall.  Tons of features. The slide motions should have been tougher.

Samsung D357 - Great work phone, Bluetooth, easy to use, Durable.

LG CU320 - The first and only 3G phone that works good.  Streaming Video, Swivel camera.  Kind of Bulky

LG C1300 - great starter, lacks any special features.  good reception

Pantech 300 - Very tinyyy, Nice features for its size.  Too bad it doesn't have Bluetooth.

Cingular 2125 - Not the nicest phone on the block,  Good features.  Not a good keypad.

Cingular 8125 - Nice looking, Great keyboard, WiFi, Awesome Camera, Large/Touch screen.

Nokia 9300 - Too expensive but not enough looks. 

Palm Treo 650 - Large screen, Nice Camera, Touchscreen, not a good keyboard.

LG CG225 - Nice looking.  Simple.  Lacks Bluetooth

LG CU500 - Very sharp!!! Great features.  Nice external MP3 controls. Slim, Rotating Camera, Bluetooth

Samsung ZX20/ZX10 - Fastest phone out to date. 3.5G (UMTS/HSDPA) 14.4 Mbit/sec  Rotating Camera, Bluetooth.

Samsung C417 - Very Slim.  Nice looking.  Cannot send/recieve files via Bluetooth.

Motorola L2 - Very similar to L7 SLVR.  Reception is not so great.  Bad Keypad. Bluetooth

Cingular 3125 - Very Nice.  Great phone overall.  Kind of slow for Windows 5.  Pretty small for a smartphone.

Pantech C120 - Nice n' Small.  Great starter phone.  Camera. Lacks other special features.  Great Price!!

_______________________Updates!!!________________________

Motorola KRZR - Very nice looking. Feature packed. No 3G.  Very fragile front glass.  Dont Drop!

Nokia N75 - Excellent phone.  Full HTML browser. Great Camera.  Flip kind of weak.

LG CU400 - Great phone for price.  Good starter.  3G with streaming video and audio.  Poor camera

Samsung Blackjack - Nice looking.  Annoying keypad.  Slow processor

Cingular 8525 - Best Pocket PC with Windows to date. 07-26-07.  Fast processor. 3G. great keyboard

iPhone - Very good touch interface.  Lacks simple features. Fragile.  Great phone overall.  Full HTML browser.

Here are some European Phones or Unlocked Unbranded Phones.

Unlocked phones simply mean that they can be used with any GSM carrier depending on their frequency.  QuadBand phones included GSM 850/900/1800/1900.  Cingular uses 850Mhz and 1900Mhz.  T-Mobile uses 1800Mhz and most countries outside the USA use 900Mhz.  Companies lock the other bands so they can only be used with their service so the phone becomes exclusive to that certain carrier.

Samsung D900 - Excellent phone!!  3.1MP camera.  Very slim.  Kind of Fragile, QuadBand

Sony Ericsson K800 - Best Camera and Flash on a phone. 3.2MP Cybershot (Autofocus - Carl Zeiss Lense) camera with a Xenon FLASH! QuadBand

Nokia N93 - Great Camera!  Extra Large Screen, Weak Hinge, Bulkyy.  Nice features

Nokia 8800 - Looks and feels great!  Nothing extraordinary.  All stainless steel housing and interior.

Thats it for now. Check back again for more updates!!  If you have any questions about other phones or services contact me and I will provide my feedback for them.