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Incoming calls displaying as Unknown


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All incoming calls displaying as Unknown numbers on 2016 ct200h. This has only recently happened. All was OK before. Names are saved in phone (Samsung s20) and all is paired via Bluetooth correctly. The phone book in the car is displaying the names but incoming calls is not. Any advice as to what the problem could be. 

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If you get an answer, I have same question. Also, a 2016. Difference: it has been like that always so I thought it is normal. Phonebook with names and all are in and music is playing just fine both via Bluetooth and line in. Can search the phonebook on the screen in the CT and call from there but no matter if person calling is in phonebook or not display says: unknown. Also Samsung.

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I had a similar issue with my previous 2016 NX, and also a Samsung phone (Note 10+).

I solved it by adding the country prefix to all phone numbers.

i.e. 07710 123456 became +44 7710 123456

or 01703 555444 became +44 1703 555444

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All good with mine(iphone) but if i add a new number in the phones list it will come up as unknown.It,s probably because it,s not synced to the cars phone list.

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On 5/19/2021 at 2:30 PM, DanD said:

I had a similar issue with my previous 2016 NX, and also a Samsung phone (Note 10+).

I solved it by adding the country prefix to all phone numbers.

i.e. 07710 123456 became +44 7710 123456

or 01703 555444 became +44 1703 555444

All contacts in phone list have country code in them and all show as unknown.

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On 5/19/2021 at 2:30 PM, DanD said:

I had a similar issue with my previous 2016 NX, and also a Samsung phone (Note 10+).

I solved it by adding the country prefix to all phone numbers.

i.e. 07710 123456 became +44 7710 123456

or 01703 555444 became +44 1703 555444

+1 to that, it sorted my issue with caller ID.

Sometimes it's best if you unpair your phone and factory reset the head unit. It forces it to re-download the phonebook. I have no issues in 2016 CT&GS now with my Note10+ & S20

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