What kind of phone are you trying to pair?
Check it against the compatible phones list,
http://www.infinitiusa.com/bluetooth?to ... .Bluetooth
First thing I would try is deleting and repairing both the phone from the car and the car from the phone.
Depending on make,model there should/might be a setting to export the correct data in a way the car can understand.
Also check the operating software edition of the AV control unit.
Press INFO
Version Software,
[should end in 1,1a]
if it ends in 1b it might have already been updated.
There is a small update TSB for some 09/10 Gs that might be needed to fix this.
Hope your moms still liking the car. They really are nice.
(the Version 1b nav software might be nee)