Phone Make & Model Plug Adapter Performance Side Tone
    Nokia        
    Motorola        
    V.60 Standard No Excellent Yes
    V.120 Standard No Excellent Yes
    8160/StarTac Standard No Excellent Yes
    Samsung        
    105 Series Custom N/A Incompatible N/A
    R225M Custom N/A Incompatible N/A
    SCHA310 Standard No Excellent No
    A460 Standard No Excellent No
    M400 Standard No Incompatible No
    A500 Standard No Excellent Yes
    Ericson        
    LG510 Standard No Excellent Yes
    T60/1 Standard No Good No
    R300LX Custom Yes Good No
    TG8/G81 Custom Yes Good No
    Kyocera        
    2235/2250 Standard No Excellent Yes
    4NE1 Standard No Excellent No
    6035 Standard No Excellent Yes
    Sanyo        
    SCP-5150 Standard No Excellent No
    SCP-6200 Standard No Excellent No
    SCP-4700 Standard No Excellent No
    Audiovox        
    9155 Standard No Excellent No
    Panasonic        
    1EB-TX 310/320 Standard No Good Yes

"Standard" plug as defined by the Cell Phone industry is the 2.5mm 3 conductor plug. Even though your plug/interface might look standard please check the chart above for performance.