Best simple mobile phone with GPS tracking

Hi,

This is my first post.

Can anyone please help me? I am trying to find a simple mobile phone which has a GPS tracking facility built-in due as my Father has been losing his phone recently.

The idea would be that my Mother would either go online, or use a tracking app, to find the phone.

A smart phone, such as an iPhone etc, is too complicated for him. He needs a simple one, with a small uncluttered screen and reasonable size button, such as a flip phone.

I have looked at the Doro range but they are either not connected to GPS (therefore not trackable) or too restrictive, such as the 780x model.

Can anyone suggest a phone that can do the job?

I have been looking at Nokias but can’t find a relevant one so far.

Many thanks in advance to anyone that can assist.