Greetings All!
I am looking to extend my existing ATT contract and would appreciate any feedback relating to decent flip phones - I want to get a worry free flip phone, I am afraid that I may crack the display of a non-flip kind in my pocket, with my car keys, etc. 
Here are some of the flip phones that ATT offers - please add or suggest any that I may have overlooked. Phone sound quality is paramount.
Many Thanks!!
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LG CD110
NOKIA 6085
SONY ERICSSON Z310a
NOKIA 6555
SAMSUNG A437
SAMSUNG A117
SONY ERICSSON W300i
SONY ERICSSON Z750a
MOTOROLA V365
LC CU515
NOKIA N75
MOTO RAZR2 V9
SAMSUNG SLM