Sprint Nextel S1 User Manual

All the Bluetooth settings you configure are stored in your
phone’s Bluetooth user profile. Different profiles can be used
for specific Bluetooth functions.

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Headset Profile – This profile functions as a wireless ear
jack. When an incoming call is received, the ringer can be
heard through the headset instead of through the phone.
The call can then be received by pushing a button. While
using your phone, you can use the headset instead of the
phone by pushing a button on the headset, the same as
inserting a jack into the phone. Increase or decrease the
volume by using the side volume key.

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Hands-Free Profile – This profile functions as a wireless 
car-kit. Incoming calls ring to the hands-free headset or
device. Calls can be received by pressing a button on the
headset or device.  For dialing, four functions are
supported: recent call dial, voice dial, speed dial, and
number dial. Increase or decrease the volume by using the
side volume key.

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DUN: Dial-Up Network Profile – This profile functions as a
wireless data cable, connecting a PC or PDA to a network
through your phone.

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OPP:Object Push Profile –This profile uses the Generic
Object Exchange profile services to send data objects
between devices and can be used to exchange business
cards (vCard).