scott schrieb:
>> If you can switch between hand-held and carkit speakers, it's not SAP 
>> but classic Handsfree Profile (HFP), in which case your phone is still 
>> doing the hard work and burning battery power.
> 
> Maybe there is a way to switch between the two, I haven't found it yet 
> though apart from turning off bluetooth on my phone.

That's unlikely; usually, carkits feature /either/ Handsfree Profile 
/or/ Sim Access Profile. So far I haven't seen any carkit that did both.

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