problem I have in not being able to transfer the sound from my SE K750i to my car HFT. Incoming calls work fine but I've ran out of ideas in transferring the sound for outgoing call. One guy suggested that I should change my firmware from R1CA021 TO R1DB001 but I'm not sure if it will invalidate my warranty or work with my PAYG Orange SIM. Can you advise.
I had the same problem with my Orange K750i.
It worked fine when I first had the car/phone combi and then I used SEUS to update my 'phone as recommended via the SE website. Worked a treat and then I noticed that outgoing calls always transferred the sound to the phone
Bizarrely, incoming calls worked fine (or was it the other way around ?)
There is a bug in the RICA021 bluetooth drivers which cause this. The problem is that SEUS will only update Orange branded K750i to RICA021
After some careful investiagtion I discovered that I could quite happily update to RIDB001, using the DaVinci program. It's a free download, but it cost ~£7 to actually do the update. Just follow the instructions carefully.
A word of warning though, I managed to totally de-brand my phone and lost all my settings (and phone book, which I had saved elsewhere). I think that I didn't need to do that, I just ticked one box too many.
Anyway, the good news is that the phone (which now looks like a standard SE K750i) is now working fine with the HFT
I cannot comment on the warrenty question though, but then my phone is over a year old now anyway.