I have a Toyota aygo with built in tom tom I have paired my I phone 6 s with it successfully and can make and hear calls but when I answer a call there's nothing no sound at all ????

SOURCE: no voice or sound

Did you check that you didn't activate mute?
If it is on mute. Press both volume buttons at the same time you will hear two descending audio tones.

SOURCE: Can't hear anything in my bluetooth headset, mic is working

Hi--First, make sure your "mute" function is off.  Try holding both volume buttons at the same time for a second or two.  If that doesn't help, while you're having a conversation, either with or without bluetooth, make sure your phone's volume is turned up.  On a lot of phones the volume button will control both ringer and conversation volumes, but turning it up without the phone in use only affects the ringer volume.  My husband thought there was something wrong with his bluetooth until we noticed his phone volume was set too low--not as noticeable on handset, but bluetooth apparently needs volume up pretty high!

SOURCE: Paired Blackberry Curve 8310 w/Range Rover 2005 drops calls

Ok, this isn't so much a solution as a work around.

As long as your phone is still holding the call (showing connected), once the Range Rover drops the call, hit the soft button that shows a picture of a green phone receiver....as if you were making a call. This will cause the Range Rover to reconnect the speakrs/mike to the phone, and you can continue your call in relative harmony.

I still haven't figured out how to get out of the jam when a second call comes in while you are still on the first....

Good Luck

prduck

SOURCE: My BlueAnt won't go into pairing mode anymore!

Have you tried resetting the Blueant Z9i? You push the Volume Up, Volume Down and Blueant buttons all at the same time (with the device on). This will eliminate all paired phones, then re-pair with just your phone (hold down Blueant button for 6 seconds or so to enter pairing mode).

SOURCE: phone won't ring with incoming calls

I just bought a new Uniden DECT 6.0 phone and had a similar problem. It wouldn't ring when plugged into my Linksys voip router, but my old 5.8 GHz did ring. It would get a dialtone and make calls, but when called via an outside line, it would appear as if it was ringing. If I picked up during this "silent ring," it would answer and take the call. It wasn't a ringer volume issue. I called tech support, they said on the main headset, unplug the battery, then unplug power from the base, then unplug the phone cord from the base. Wait 15-30s. Plug the phone cord, then power, then reinstall the battery. Press the End button on the phone. Put the phone on the base for 15-30s. Pick up the phone. Press and hold the Find button on the base. Do this Find thing 3 times. Put the phone back on the base. Wait 10-15 minutes. Then try calling it to see if it rings. Worked for me, finally got it to ring before I decided to return it.