Pairing phone to sat nav

I cant pair my phone to my TT510 it will get to 40% connected and then keep asking on the phone for the connecting code i’ll put it in and nothing happens. Is it the fact that my phone is a LG Viewty and a fairly new model and the 510 is an old model■■? Cheers in advance for any info given

could be the phone is missing abluetooth protocoolor just isnt compatable with the 510 if you have a dig through the tomtom site theres a compatability list